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id="n-mainpage-description" class="mw-list-item"><a href="/wiki/Forside" title="Gå til hovedsiden [z]" accesskey="z"><span>Forside</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Spesial:Tilfeldig" title="Vis en tilfeldig side [x]" accesskey="x"><span>Tilfeldig side</span></a></li><li id="n-help" class="mw-list-item"><a href="/wiki/Hjelp:Portal" title="Stedet for å få hjelp"><span>Hjelp</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Spesial:Siste_endringer" title="Liste over siste endringer på wikien. 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role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Spesial:S%C3%B8k" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Søk i Wikipedia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Søk</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Søk i Wikipedia" aria-label="Søk i Wikipedia" autocapitalize="sentences" title="Søk i Wikipedia [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Spesial:Søk"> </div> <button class="cdx-button cdx-search-input__end-button">Søk</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Personlig"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Utseende"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Endre skriftstørrelse, bredde og farge på siden." > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Utseende" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Utseende</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_no.wikipedia.org&uselang=nb" class=""><span>Doner</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Spesial:Opprett_konto&returnto=Energi" title="Du oppfordres til å opprette en konto og logge inn, men det er ikke obligatorisk" class=""><span>Opprett konto</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Spesial:Logg_inn&returnto=Energi" title="Du oppfordres til å logge inn, men det er ikke obligatorisk [o]" accesskey="o" class=""><span>Logg inn</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out user-links-collapsible-item" title="Flere alternativer" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Personlig" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Personlig</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Brukermeny" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_no.wikipedia.org&uselang=nb"><span>Doner</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Spesial:Opprett_konto&returnto=Energi" title="Du oppfordres til å opprette en konto og logge inn, men det er ikke obligatorisk"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Opprett konto</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Spesial:Logg_inn&returnto=Energi" title="Du oppfordres til å logge inn, men det er ikke obligatorisk [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Logg inn</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Nettsted"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Innhold" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Innhold</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">flytt til sidefeltet</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">skjul</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(Til toppen)</div> </a> </li> <li id="toc-Enheter" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Enheter"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Enheter</span> </div> </a> <button aria-controls="toc-Enheter-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Vis/skjul underseksjonen Enheter</span> </button> <ul id="toc-Enheter-sublist" class="vector-toc-list"> <li id="toc-SI_og_tilhørende_enheter" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#SI_og_tilhørende_enheter"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>SI og tilhørende enheter</span> </div> </a> <ul id="toc-SI_og_tilhørende_enheter-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Andre_energienheter" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Andre_energienheter"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2</span> <span>Andre energienheter</span> </div> </a> <ul id="toc-Andre_energienheter-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Energioverføring" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Energioverføring"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Energioverføring</span> </div> </a> <button aria-controls="toc-Energioverføring-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Vis/skjul underseksjonen Energioverføring</span> </button> <ul id="toc-Energioverføring-sublist" class="vector-toc-list"> <li id="toc-Arbeid" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Arbeid"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Arbeid</span> </div> </a> <ul id="toc-Arbeid-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Varme" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Varme"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Varme</span> </div> </a> <ul id="toc-Varme-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Energibevarelse" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Energibevarelse"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Energibevarelse</span> </div> </a> <ul id="toc-Energibevarelse-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Kinetisk_energi" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Kinetisk_energi"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Kinetisk energi</span> </div> </a> <ul id="toc-Kinetisk_energi-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Potensiell_energi" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Potensiell_energi"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Potensiell energi</span> </div> </a> <button aria-controls="toc-Potensiell_energi-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Vis/skjul underseksjonen Potensiell energi</span> </button> <ul id="toc-Potensiell_energi-sublist" class="vector-toc-list"> <li id="toc-Gravitasjonsenergi" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Gravitasjonsenergi"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.1</span> <span>Gravitasjonsenergi</span> </div> </a> <ul id="toc-Gravitasjonsenergi-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Andre_eksempler" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Andre_eksempler"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.2</span> <span>Andre eksempler</span> </div> </a> <ul id="toc-Andre_eksempler-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Energi_som_tilstandsvariabel" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Energi_som_tilstandsvariabel"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Energi som tilstandsvariabel</span> </div> </a> <ul id="toc-Energi_som_tilstandsvariabel-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Kjemisk_energi" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Kjemisk_energi"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Kjemisk energi</span> </div> </a> <ul id="toc-Kjemisk_energi-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Nukleær_potensiell_energi" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Nukleær_potensiell_energi"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Nukleær potensiell energi</span> </div> </a> <ul id="toc-Nukleær_potensiell_energi-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Se_også" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Se_også"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>Se også</span> </div> </a> <ul id="toc-Se_også-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Referanser" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Referanser"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>Referanser</span> </div> </a> <ul id="toc-Referanser-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Litteratur" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Litteratur"> <div class="vector-toc-text"> <span class="vector-toc-numb">11</span> <span>Litteratur</span> </div> </a> <ul id="toc-Litteratur-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Eksterne_lenker" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Eksterne_lenker"> <div class="vector-toc-text"> <span class="vector-toc-numb">12</span> <span>Eksterne lenker</span> </div> </a> <ul id="toc-Eksterne_lenker-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Innhold" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Vis/skjul innholdsfortegnelsen" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Vis/skjul innholdsfortegnelsen</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Energi</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Gå til en artikkel på et annet språk. Tilgjengelig på 169 språk" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-169" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">169 språk</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Energi" title="Energi – norsk nynorsk" lang="nn" hreflang="nn" data-title="Energi" data-language-autonym="Norsk nynorsk" data-language-local-name="norsk nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Energi" title="Energi – dansk" lang="da" hreflang="da" data-title="Energi" data-language-autonym="Dansk" data-language-local-name="dansk" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Energi" title="Energi – svensk" lang="sv" hreflang="sv" data-title="Energi" data-language-autonym="Svenska" data-language-local-name="svensk" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-is badge-Q17437798 badge-goodarticle mw-list-item" title="anbefalt artikkel-merke"><a href="https://is.wikipedia.org/wiki/Orka" title="Orka – islandsk" lang="is" hreflang="is" data-title="Orka" data-language-autonym="Íslenska" data-language-local-name="islandsk" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-ace mw-list-item"><a href="https://ace.wikipedia.org/wiki/%C3%89nerji" title="Énerji – achinesisk" lang="ace" hreflang="ace" data-title="Énerji" data-language-autonym="Acèh" data-language-local-name="achinesisk" class="interlanguage-link-target"><span>Acèh</span></a></li><li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Energie" title="Energie – afrikaans" lang="af" hreflang="af" data-title="Energie" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-als mw-list-item"><a href="https://als.wikipedia.org/wiki/Energie" title="Energie – sveitsertysk" lang="gsw" hreflang="gsw" data-title="Energie" data-language-autonym="Alemannisch" data-language-local-name="sveitsertysk" class="interlanguage-link-target"><span>Alemannisch</span></a></li><li class="interlanguage-link interwiki-am mw-list-item"><a href="https://am.wikipedia.org/wiki/%E1%8A%A0%E1%89%85%E1%88%9D" title="አቅም – amharisk" lang="am" hreflang="am" data-title="አቅም" data-language-autonym="አማርኛ" data-language-local-name="amharisk" class="interlanguage-link-target"><span>አማርኛ</span></a></li><li class="interlanguage-link interwiki-smn mw-list-item"><a href="https://smn.wikipedia.org/wiki/Energia" title="Energia – enaresamisk" lang="smn" hreflang="smn" data-title="Energia" data-language-autonym="Anarâškielâ" data-language-local-name="enaresamisk" class="interlanguage-link-target"><span>Anarâškielâ</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B7%D8%A7%D9%82%D8%A9" title="طاقة – arabisk" lang="ar" hreflang="ar" data-title="طاقة" data-language-autonym="العربية" data-language-local-name="arabisk" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Enerch%C3%ADa" title="Enerchía – aragonsk" lang="an" hreflang="an" data-title="Enerchía" data-language-autonym="Aragonés" data-language-local-name="aragonsk" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-arc mw-list-item"><a href="https://arc.wikipedia.org/wiki/%DC%AC%DC%98%DC%A9%DC%A6%DC%90" title="ܬܘܩܦܐ – arameisk" lang="arc" hreflang="arc" data-title="ܬܘܩܦܐ" data-language-autonym="ܐܪܡܝܐ" data-language-local-name="arameisk" class="interlanguage-link-target"><span>ܐܪܡܝܐ</span></a></li><li class="interlanguage-link interwiki-as mw-list-item"><a href="https://as.wikipedia.org/wiki/%E0%A6%B6%E0%A6%95%E0%A7%8D%E0%A6%A4%E0%A6%BF" title="শক্তি – assamesisk" lang="as" hreflang="as" data-title="শক্তি" data-language-autonym="অসমীয়া" data-language-local-name="assamesisk" class="interlanguage-link-target"><span>অসমীয়া</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Enerx%C3%ADa" title="Enerxía – asturisk" lang="ast" hreflang="ast" data-title="Enerxía" data-language-autonym="Asturianu" data-language-local-name="asturisk" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-gn mw-list-item"><a href="https://gn.wikipedia.org/wiki/Mbaretekue" title="Mbaretekue – guarani" lang="gn" hreflang="gn" data-title="Mbaretekue" data-language-autonym="Avañe'ẽ" data-language-local-name="guarani" class="interlanguage-link-target"><span>Avañe'ẽ</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Enerji" title="Enerji – aserbajdsjansk" lang="az" hreflang="az" data-title="Enerji" data-language-autonym="Azərbaycanca" data-language-local-name="aserbajdsjansk" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D8%A7%D9%86%D8%B1%DA%98%DB%8C" title="انرژی – søraserbajdsjansk" lang="azb" hreflang="azb" data-title="انرژی" data-language-autonym="تۆرکجه" data-language-local-name="søraserbajdsjansk" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%B6%E0%A6%95%E0%A7%8D%E0%A6%A4%E0%A6%BF" title="শক্তি – bengali" lang="bn" hreflang="bn" data-title="শক্তি" data-language-autonym="বাংলা" data-language-local-name="bengali" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/L%C3%AAng-li%C5%8Dng" title="Lêng-liōng – minnan" lang="nan" hreflang="nan" data-title="Lêng-liōng" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="minnan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/%D0%AD%D0%BD%D0%B5%D1%80%D0%B3%D0%B8%D1%8F" title="Энергия – basjkirsk" lang="ba" hreflang="ba" data-title="Энергия" data-language-autonym="Башҡортса" data-language-local-name="basjkirsk" class="interlanguage-link-target"><span>Башҡортса</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%AD%D0%BD%D0%B5%D1%80%D0%B3%D1%96%D1%8F" title="Энергія – belarusisk" lang="be" hreflang="be" data-title="Энергія" data-language-autonym="Беларуская" data-language-local-name="belarusisk" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%AD%D0%BD%D1%8D%D1%80%D0%B3%D1%96%D1%8F" title="Энэргія – belarusisk (klassisk ortografi)" lang="be-tarask" hreflang="be-tarask" data-title="Энэргія" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="belarusisk (klassisk ortografi)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bh mw-list-item"><a href="https://bh.wikipedia.org/wiki/%E0%A4%8A%E0%A4%B0%E0%A5%8D%E0%A4%9C%E0%A4%BE" title="ऊर्जा – bihari" lang="bh" hreflang="bh" data-title="ऊर्जा" data-language-autonym="भोजपुरी" data-language-local-name="bihari" class="interlanguage-link-target"><span>भोजपुरी</span></a></li><li class="interlanguage-link interwiki-bcl mw-list-item"><a href="https://bcl.wikipedia.org/wiki/Enerhiya" title="Enerhiya – sentralbikol" lang="bcl" hreflang="bcl" data-title="Enerhiya" data-language-autonym="Bikol Central" data-language-local-name="sentralbikol" class="interlanguage-link-target"><span>Bikol Central</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%95%D0%BD%D0%B5%D1%80%D0%B3%D0%B8%D1%8F" title="Енергия – bulgarsk" lang="bg" hreflang="bg" data-title="Енергия" data-language-autonym="Български" data-language-local-name="bulgarsk" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bar mw-list-item"><a href="https://bar.wikipedia.org/wiki/Energie" title="Energie – bairisk" lang="bar" hreflang="bar" data-title="Energie" data-language-autonym="Boarisch" data-language-local-name="bairisk" class="interlanguage-link-target"><span>Boarisch</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Energija" title="Energija – bosnisk" lang="bs" hreflang="bs" data-title="Energija" data-language-autonym="Bosanski" data-language-local-name="bosnisk" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Energiezh" title="Energiezh – bretonsk" lang="br" hreflang="br" data-title="Energiezh" data-language-autonym="Brezhoneg" data-language-local-name="bretonsk" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Energia" title="Energia – katalansk" lang="ca" hreflang="ca" data-title="Energia" data-language-autonym="Català" data-language-local-name="katalansk" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%AD%D0%BD%D0%B5%D1%80%D0%B3%D0%B8" title="Энерги – tsjuvasjisk" lang="cv" hreflang="cv" data-title="Энерги" data-language-autonym="Чӑвашла" data-language-local-name="tsjuvasjisk" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-ceb mw-list-item"><a href="https://ceb.wikipedia.org/wiki/Enerhiya" title="Enerhiya – cebuano" lang="ceb" hreflang="ceb" data-title="Enerhiya" data-language-autonym="Cebuano" data-language-local-name="cebuano" class="interlanguage-link-target"><span>Cebuano</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Energie" title="Energie – tsjekkisk" lang="cs" hreflang="cs" data-title="Energie" data-language-autonym="Čeština" data-language-local-name="tsjekkisk" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-sn mw-list-item"><a href="https://sn.wikipedia.org/wiki/Simba" title="Simba – shona" lang="sn" hreflang="sn" data-title="Simba" data-language-autonym="ChiShona" data-language-local-name="shona" class="interlanguage-link-target"><span>ChiShona</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Egni_(gwyddonol)" title="Egni (gwyddonol) – walisisk" lang="cy" hreflang="cy" data-title="Egni (gwyddonol)" data-language-autonym="Cymraeg" data-language-local-name="walisisk" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/%D8%B7%D8%A7%D9%82%D8%A9" title="طاقة – marokkansk-arabisk" lang="ary" hreflang="ary" data-title="طاقة" data-language-autonym="الدارجة" data-language-local-name="marokkansk-arabisk" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Energie" title="Energie – tysk" lang="de" hreflang="de" data-title="Energie" data-language-autonym="Deutsch" data-language-local-name="tysk" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Energia" title="Energia – estisk" lang="et" hreflang="et" data-title="Energia" data-language-autonym="Eesti" data-language-local-name="estisk" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%95%CE%BD%CE%AD%CF%81%CE%B3%CE%B5%CE%B9%CE%B1" title="Ενέργεια – gresk" lang="el" hreflang="el" data-title="Ενέργεια" data-language-autonym="Ελληνικά" data-language-local-name="gresk" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Energy" title="Energy – engelsk" lang="en" hreflang="en" data-title="Energy" data-language-autonym="English" data-language-local-name="engelsk" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-myv mw-list-item"><a href="https://myv.wikipedia.org/wiki/%D0%90%D0%BB%D1%8C%D0%BC%D0%B5" title="Альме – erzia" lang="myv" hreflang="myv" data-title="Альме" data-language-autonym="Эрзянь" data-language-local-name="erzia" class="interlanguage-link-target"><span>Эрзянь</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Energ%C3%ADa" title="Energía – spansk" lang="es" hreflang="es" data-title="Energía" data-language-autonym="Español" data-language-local-name="spansk" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Energio" title="Energio – esperanto" lang="eo" hreflang="eo" data-title="Energio" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-ext mw-list-item"><a href="https://ext.wikipedia.org/wiki/Nirg%C3%ADa" title="Nirgía – ekstremaduransk" lang="ext" hreflang="ext" data-title="Nirgía" data-language-autonym="Estremeñu" data-language-local-name="ekstremaduransk" class="interlanguage-link-target"><span>Estremeñu</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Energia" title="Energia – baskisk" lang="eu" hreflang="eu" data-title="Energia" data-language-autonym="Euskara" data-language-local-name="baskisk" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%A7%D9%86%D8%B1%DA%98%DB%8C" title="انرژی – persisk" lang="fa" hreflang="fa" data-title="انرژی" data-language-autonym="فارسی" data-language-local-name="persisk" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-hif mw-list-item"><a href="https://hif.wikipedia.org/wiki/Shakti" title="Shakti – fijiansk hindi" lang="hif" hreflang="hif" data-title="Shakti" data-language-autonym="Fiji Hindi" data-language-local-name="fijiansk hindi" class="interlanguage-link-target"><span>Fiji Hindi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/%C3%89nergie_(physique)" title="Énergie (physique) – fransk" lang="fr" hreflang="fr" data-title="Énergie (physique)" data-language-autonym="Français" data-language-local-name="fransk" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-fy mw-list-item"><a href="https://fy.wikipedia.org/wiki/Enerzjy" title="Enerzjy – vestfrisisk" lang="fy" hreflang="fy" data-title="Enerzjy" data-language-autonym="Frysk" data-language-local-name="vestfrisisk" class="interlanguage-link-target"><span>Frysk</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Fuinneamh" title="Fuinneamh – irsk" lang="ga" hreflang="ga" data-title="Fuinneamh" data-language-autonym="Gaeilge" data-language-local-name="irsk" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gv mw-list-item"><a href="https://gv.wikipedia.org/wiki/Bree" title="Bree – mansk" lang="gv" hreflang="gv" data-title="Bree" data-language-autonym="Gaelg" data-language-local-name="mansk" class="interlanguage-link-target"><span>Gaelg</span></a></li><li class="interlanguage-link interwiki-gd mw-list-item"><a href="https://gd.wikipedia.org/wiki/L%C3%B9th" title="Lùth – skotsk-gælisk" lang="gd" hreflang="gd" data-title="Lùth" data-language-autonym="Gàidhlig" data-language-local-name="skotsk-gælisk" class="interlanguage-link-target"><span>Gàidhlig</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Enerx%C3%ADa" title="Enerxía – galisisk" lang="gl" hreflang="gl" data-title="Enerxía" data-language-autonym="Galego" data-language-local-name="galisisk" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-inh mw-list-item"><a href="https://inh.wikipedia.org/wiki/%D0%A5%D1%8C%D0%B8%D0%BD%D0%B0%D1%80" title="Хьинар – ingusjisk" lang="inh" hreflang="inh" data-title="Хьинар" data-language-autonym="ГӀалгӀай" data-language-local-name="ingusjisk" class="interlanguage-link-target"><span>ГӀалгӀай</span></a></li><li class="interlanguage-link interwiki-gu mw-list-item"><a href="https://gu.wikipedia.org/wiki/%E0%AA%89%E0%AA%B0%E0%AB%8D%E0%AA%9C%E0%AA%BE" title="ઉર્જા – gujarati" lang="gu" hreflang="gu" data-title="ઉર્જા" data-language-autonym="ગુજરાતી" data-language-local-name="gujarati" class="interlanguage-link-target"><span>ગુજરાતી</span></a></li><li class="interlanguage-link interwiki-hak mw-list-item"><a href="https://hak.wikipedia.org/wiki/N%C3%A8n-li%C3%B2ng" title="Nèn-liòng – hakka" lang="hak" hreflang="hak" data-title="Nèn-liòng" data-language-autonym="客家語 / Hak-kâ-ngî" data-language-local-name="hakka" class="interlanguage-link-target"><span>客家語 / Hak-kâ-ngî</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%97%90%EB%84%88%EC%A7%80" title="에너지 – koreansk" lang="ko" hreflang="ko" data-title="에너지" data-language-autonym="한국어" data-language-local-name="koreansk" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ha mw-list-item"><a href="https://ha.wikipedia.org/wiki/Makamashi" title="Makamashi – hausa" lang="ha" hreflang="ha" data-title="Makamashi" data-language-autonym="Hausa" data-language-local-name="hausa" class="interlanguage-link-target"><span>Hausa</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D4%B7%D5%B6%D5%A5%D6%80%D5%A3%D5%AB%D5%A1" title="Էներգիա – armensk" lang="hy" hreflang="hy" data-title="Էներգիա" data-language-autonym="Հայերեն" data-language-local-name="armensk" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%8A%E0%A4%B0%E0%A5%8D%E0%A4%9C%E0%A4%BE" title="ऊर्जा – hindi" lang="hi" hreflang="hi" data-title="ऊर्जा" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Energija" title="Energija – kroatisk" lang="hr" hreflang="hr" data-title="Energija" data-language-autonym="Hrvatski" data-language-local-name="kroatisk" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Energio" title="Energio – ido" lang="io" hreflang="io" data-title="Energio" data-language-autonym="Ido" data-language-local-name="ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-ilo mw-list-item"><a href="https://ilo.wikipedia.org/wiki/Enerhia" title="Enerhia – iloko" lang="ilo" hreflang="ilo" data-title="Enerhia" data-language-autonym="Ilokano" data-language-local-name="iloko" class="interlanguage-link-target"><span>Ilokano</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Energi" title="Energi – indonesisk" lang="id" hreflang="id" data-title="Energi" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesisk" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Energia" title="Energia – interlingua" lang="ia" hreflang="ia" data-title="Energia" data-language-autonym="Interlingua" data-language-local-name="interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-ie mw-list-item"><a href="https://ie.wikipedia.org/wiki/Energie" title="Energie – interlingue" lang="ie" hreflang="ie" data-title="Energie" data-language-autonym="Interlingue" data-language-local-name="interlingue" class="interlanguage-link-target"><span>Interlingue</span></a></li><li class="interlanguage-link interwiki-zu mw-list-item"><a href="https://zu.wikipedia.org/wiki/Isidlakalasi" title="Isidlakalasi – zulu" lang="zu" hreflang="zu" data-title="Isidlakalasi" data-language-autonym="IsiZulu" data-language-local-name="zulu" class="interlanguage-link-target"><span>IsiZulu</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Energia" title="Energia – italiensk" lang="it" hreflang="it" data-title="Energia" data-language-autonym="Italiano" data-language-local-name="italiensk" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%90%D7%A0%D7%A8%D7%92%D7%99%D7%94" title="אנרגיה – hebraisk" lang="he" hreflang="he" data-title="אנרגיה" data-language-autonym="עברית" data-language-local-name="hebraisk" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-jv mw-list-item"><a href="https://jv.wikipedia.org/wiki/%C3%88nergi" title="Ènergi – javanesisk" lang="jv" hreflang="jv" data-title="Ènergi" data-language-autonym="Jawa" data-language-local-name="javanesisk" class="interlanguage-link-target"><span>Jawa</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%B6%E0%B2%95%E0%B3%8D%E0%B2%A4%E0%B2%BF" title="ಶಕ್ತಿ – kannada" lang="kn" hreflang="kn" data-title="ಶಕ್ತಿ" data-language-autonym="ಕನ್ನಡ" data-language-local-name="kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%94%E1%83%9C%E1%83%94%E1%83%A0%E1%83%92%E1%83%98%E1%83%90" title="ენერგია – georgisk" lang="ka" hreflang="ka" data-title="ენერგია" data-language-autonym="ქართული" data-language-local-name="georgisk" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%AD%D0%BD%D0%B5%D1%80%D0%B3%D0%B8%D1%8F" title="Энергия – kasakhisk" lang="kk" hreflang="kk" data-title="Энергия" data-language-autonym="Қазақша" data-language-local-name="kasakhisk" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-kw mw-list-item"><a href="https://kw.wikipedia.org/wiki/Nerth" title="Nerth – kornisk" lang="kw" hreflang="kw" data-title="Nerth" data-language-autonym="Kernowek" data-language-local-name="kornisk" class="interlanguage-link-target"><span>Kernowek</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Nishati" title="Nishati – swahili" lang="sw" hreflang="sw" data-title="Nishati" data-language-autonym="Kiswahili" data-language-local-name="swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/En%C3%A8ji" title="Enèji – haitisk" lang="ht" hreflang="ht" data-title="Enèji" data-language-autonym="Kreyòl ayisyen" data-language-local-name="haitisk" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-gcr mw-list-item"><a href="https://gcr.wikipedia.org/wiki/%C3%89nerji" title="Énerji – franskguyansk kreol" lang="gcr" hreflang="gcr" data-title="Énerji" data-language-autonym="Kriyòl gwiyannen" data-language-local-name="franskguyansk kreol" class="interlanguage-link-target"><span>Kriyòl gwiyannen</span></a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/Wize" title="Wize – kurdisk" lang="ku" hreflang="ku" data-title="Wize" data-language-autonym="Kurdî" data-language-local-name="kurdisk" class="interlanguage-link-target"><span>Kurdî</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%AD%D0%BD%D0%B5%D1%80%D0%B3%D0%B8%D1%8F" title="Энергия – kirgisisk" lang="ky" hreflang="ky" data-title="Энергия" data-language-autonym="Кыргызча" data-language-local-name="kirgisisk" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-lo mw-list-item"><a href="https://lo.wikipedia.org/wiki/%E0%BA%9E%E0%BA%B0%E0%BA%A5%E0%BA%B1%E0%BA%87%E0%BA%87%E0%BA%B2%E0%BA%99" title="ພະລັງງານ – laotisk" lang="lo" hreflang="lo" data-title="ພະລັງງານ" data-language-autonym="ລາວ" data-language-local-name="laotisk" class="interlanguage-link-target"><span>ລາວ</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Energia" title="Energia – latin" lang="la" hreflang="la" data-title="Energia" data-language-autonym="Latina" data-language-local-name="latin" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Ener%C4%A3ija" title="Enerģija – latvisk" lang="lv" hreflang="lv" data-title="Enerģija" data-language-autonym="Latviešu" data-language-local-name="latvisk" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Energie" title="Energie – luxemburgsk" lang="lb" hreflang="lb" data-title="Energie" data-language-autonym="Lëtzebuergesch" data-language-local-name="luxemburgsk" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Energija" title="Energija – litauisk" lang="lt" hreflang="lt" data-title="Energija" data-language-autonym="Lietuvių" data-language-local-name="litauisk" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-li mw-list-item"><a href="https://li.wikipedia.org/wiki/Energie" title="Energie – limburgsk" lang="li" hreflang="li" data-title="Energie" data-language-autonym="Limburgs" data-language-local-name="limburgsk" class="interlanguage-link-target"><span>Limburgs</span></a></li><li class="interlanguage-link interwiki-ln mw-list-item"><a href="https://ln.wikipedia.org/wiki/Molung%C3%A9" title="Molungé – lingala" lang="ln" hreflang="ln" data-title="Molungé" data-language-autonym="Lingála" data-language-local-name="lingala" class="interlanguage-link-target"><span>Lingála</span></a></li><li class="interlanguage-link interwiki-lg mw-list-item"><a href="https://lg.wikipedia.org/wiki/Energy" title="Energy – ganda" lang="lg" hreflang="lg" data-title="Energy" data-language-autonym="Luganda" data-language-local-name="ganda" class="interlanguage-link-target"><span>Luganda</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Energia" title="Energia – lombardisk" lang="lmo" hreflang="lmo" data-title="Energia" data-language-autonym="Lombard" data-language-local-name="lombardisk" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Energia" title="Energia – ungarsk" lang="hu" hreflang="hu" data-title="Energia" data-language-autonym="Magyar" data-language-local-name="ungarsk" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%95%D0%BD%D0%B5%D1%80%D0%B3%D0%B8%D1%98%D0%B0" title="Енергија – makedonsk" lang="mk" hreflang="mk" data-title="Енергија" data-language-autonym="Македонски" data-language-local-name="makedonsk" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-mg mw-list-item"><a href="https://mg.wikipedia.org/wiki/Ang%C3%B4vo" title="Angôvo – gassisk" lang="mg" hreflang="mg" data-title="Angôvo" data-language-autonym="Malagasy" data-language-local-name="gassisk" class="interlanguage-link-target"><span>Malagasy</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%8A%E0%B5%BC%E0%B4%9C%E0%B5%8D%E0%B4%9C%E0%B4%82" title="ഊർജ്ജം – malayalam" lang="ml" hreflang="ml" data-title="ഊർജ്ജം" data-language-autonym="മലയാളം" data-language-local-name="malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%8A%E0%A4%B0%E0%A5%8D%E0%A4%9C%E0%A4%BE" title="ऊर्जा – marathi" lang="mr" hreflang="mr" data-title="ऊर्जा" data-language-autonym="मराठी" data-language-local-name="marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-xmf mw-list-item"><a href="https://xmf.wikipedia.org/wiki/%E1%83%94%E1%83%9C%E1%83%94%E1%83%A0%E1%83%92%E1%83%98%E1%83%90" title="ენერგია – mingrelsk" lang="xmf" hreflang="xmf" data-title="ენერგია" data-language-autonym="მარგალური" data-language-local-name="mingrelsk" class="interlanguage-link-target"><span>მარგალური</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D8%B7%D8%A7%D9%82%D9%87" title="طاقه – egyptisk arabisk" lang="arz" hreflang="arz" data-title="طاقه" data-language-autonym="مصرى" data-language-local-name="egyptisk arabisk" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-mzn mw-list-item"><a href="https://mzn.wikipedia.org/wiki/%D8%A7%D9%86%D8%B1%DA%98%DB%8C" title="انرژی – mazandarani" lang="mzn" hreflang="mzn" data-title="انرژی" data-language-autonym="مازِرونی" data-language-local-name="mazandarani" class="interlanguage-link-target"><span>مازِرونی</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Tenaga" title="Tenaga – malayisk" lang="ms" hreflang="ms" data-title="Tenaga" data-language-autonym="Bahasa Melayu" data-language-local-name="malayisk" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-mwl mw-list-item"><a href="https://mwl.wikipedia.org/wiki/Einergie" title="Einergie – mirandesisk" lang="mwl" hreflang="mwl" data-title="Einergie" data-language-autonym="Mirandés" data-language-local-name="mirandesisk" class="interlanguage-link-target"><span>Mirandés</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%AD%D0%BD%D0%B5%D1%80%D0%B3%D0%B8" title="Энерги – mongolsk" lang="mn" hreflang="mn" data-title="Энерги" data-language-autonym="Монгол" data-language-local-name="mongolsk" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%85%E1%80%BD%E1%80%99%E1%80%BA%E1%80%B8%E1%80%A1%E1%80%84%E1%80%BA" title="စွမ်းအင် – burmesisk" lang="my" hreflang="my" data-title="စွမ်းအင်" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="burmesisk" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-fj mw-list-item"><a href="https://fj.wikipedia.org/wiki/Igu" title="Igu – fijiansk" lang="fj" hreflang="fj" data-title="Igu" data-language-autonym="Na Vosa Vakaviti" data-language-local-name="fijiansk" class="interlanguage-link-target"><span>Na Vosa Vakaviti</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Energie" title="Energie – nederlandsk" lang="nl" hreflang="nl" data-title="Energie" data-language-autonym="Nederlands" data-language-local-name="nederlandsk" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ne mw-list-item"><a href="https://ne.wikipedia.org/wiki/%E0%A4%8A%E0%A4%B0%E0%A5%8D%E0%A4%9C%E0%A4%BE" title="ऊर्जा – nepali" lang="ne" hreflang="ne" data-title="ऊर्जा" data-language-autonym="नेपाली" data-language-local-name="nepali" class="interlanguage-link-target"><span>नेपाली</span></a></li><li class="interlanguage-link interwiki-new mw-list-item"><a href="https://new.wikipedia.org/wiki/%E0%A4%8A%E0%A4%B0%E0%A5%8D%E0%A4%9C%E0%A4%BE" title="ऊर्जा – newari" lang="new" hreflang="new" data-title="ऊर्जा" data-language-autonym="नेपाल भाषा" data-language-local-name="newari" class="interlanguage-link-target"><span>नेपाल भाषा</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%82%A8%E3%83%8D%E3%83%AB%E3%82%AE%E3%83%BC" title="エネルギー – japansk" lang="ja" hreflang="ja" data-title="エネルギー" data-language-autonym="日本語" data-language-local-name="japansk" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ce mw-list-item"><a href="https://ce.wikipedia.org/wiki/%D0%AD%D0%BD%D0%B5%D1%80%D0%B3%D0%B8" title="Энерги – tsjetsjensk" lang="ce" hreflang="ce" data-title="Энерги" data-language-autonym="Нохчийн" data-language-local-name="tsjetsjensk" class="interlanguage-link-target"><span>Нохчийн</span></a></li><li class="interlanguage-link interwiki-frr badge-Q17437798 badge-goodarticle mw-list-item" title="anbefalt artikkel-merke"><a href="https://frr.wikipedia.org/wiki/Energii" title="Energii – nordfrisisk" lang="frr" hreflang="frr" data-title="Energii" data-language-autonym="Nordfriisk" data-language-local-name="nordfrisisk" class="interlanguage-link-target"><span>Nordfriisk</span></a></li><li class="interlanguage-link interwiki-nov mw-list-item"><a href="https://nov.wikipedia.org/wiki/Energie" title="Energie – novial" lang="nov" hreflang="nov" data-title="Energie" data-language-autonym="Novial" data-language-local-name="novial" class="interlanguage-link-target"><span>Novial</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Energia" title="Energia – oksitansk" lang="oc" hreflang="oc" data-title="Energia" data-language-autonym="Occitan" data-language-local-name="oksitansk" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-or mw-list-item"><a href="https://or.wikipedia.org/wiki/%E0%AC%B6%E0%AC%95%E0%AD%8D%E0%AC%A4%E0%AC%BF" title="ଶକ୍ତି – odia" lang="or" hreflang="or" data-title="ଶକ୍ତି" data-language-autonym="ଓଡ଼ିଆ" data-language-local-name="odia" class="interlanguage-link-target"><span>ଓଡ଼ିଆ</span></a></li><li class="interlanguage-link interwiki-om mw-list-item"><a href="https://om.wikipedia.org/wiki/Anniisaa" title="Anniisaa – oromo" lang="om" hreflang="om" data-title="Anniisaa" data-language-autonym="Oromoo" data-language-local-name="oromo" class="interlanguage-link-target"><span>Oromoo</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Energiya" title="Energiya – usbekisk" lang="uz" hreflang="uz" data-title="Energiya" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="usbekisk" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%8A%E0%A8%B0%E0%A8%9C%E0%A8%BE" title="ਊਰਜਾ – panjabi" lang="pa" hreflang="pa" data-title="ਊਰਜਾ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="panjabi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D8%AA%D9%88%D8%A7%D9%86%D8%A7%D8%A6%DB%8C" title="توانائی – vestpunjabi" lang="pnb" hreflang="pnb" data-title="توانائی" data-language-autonym="پنجابی" data-language-local-name="vestpunjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%D8%A7%D9%86%D8%B1%DA%98%D9%8A" title="انرژي – pashto" lang="ps" hreflang="ps" data-title="انرژي" data-language-autonym="پښتو" data-language-local-name="pashto" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-jam mw-list-item"><a href="https://jam.wikipedia.org/wiki/Enaji" title="Enaji – jamaicansk kreolengelsk" lang="jam" hreflang="jam" data-title="Enaji" data-language-autonym="Patois" data-language-local-name="jamaicansk kreolengelsk" class="interlanguage-link-target"><span>Patois</span></a></li><li class="interlanguage-link interwiki-pms mw-list-item"><a href="https://pms.wikipedia.org/wiki/Energ%C3%ACa" title="Energìa – piemontesisk" lang="pms" hreflang="pms" data-title="Energìa" data-language-autonym="Piemontèis" data-language-local-name="piemontesisk" class="interlanguage-link-target"><span>Piemontèis</span></a></li><li class="interlanguage-link interwiki-tpi mw-list-item"><a href="https://tpi.wikipedia.org/wiki/Eneji" title="Eneji – tok pisin" lang="tpi" hreflang="tpi" data-title="Eneji" data-language-autonym="Tok Pisin" data-language-local-name="tok pisin" class="interlanguage-link-target"><span>Tok Pisin</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Energie" title="Energie – nedertysk" lang="nds" hreflang="nds" data-title="Energie" data-language-autonym="Plattdüütsch" data-language-local-name="nedertysk" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Energia" title="Energia – polsk" lang="pl" hreflang="pl" data-title="Energia" data-language-autonym="Polski" data-language-local-name="polsk" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Energia" title="Energia – portugisisk" lang="pt" hreflang="pt" data-title="Energia" data-language-autonym="Português" data-language-local-name="portugisisk" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-kaa mw-list-item"><a href="https://kaa.wikipedia.org/wiki/Energiya" title="Energiya – karakalpakisk" lang="kaa" hreflang="kaa" data-title="Energiya" data-language-autonym="Qaraqalpaqsha" data-language-local-name="karakalpakisk" class="interlanguage-link-target"><span>Qaraqalpaqsha</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Energie" title="Energie – rumensk" lang="ro" hreflang="ro" data-title="Energie" data-language-autonym="Română" data-language-local-name="rumensk" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-rm mw-list-item"><a href="https://rm.wikipedia.org/wiki/Energia" title="Energia – retoromansk" lang="rm" hreflang="rm" data-title="Energia" data-language-autonym="Rumantsch" data-language-local-name="retoromansk" class="interlanguage-link-target"><span>Rumantsch</span></a></li><li class="interlanguage-link interwiki-qu mw-list-item"><a href="https://qu.wikipedia.org/wiki/Micha" title="Micha – quechua" lang="qu" hreflang="qu" data-title="Micha" data-language-autonym="Runa Simi" data-language-local-name="quechua" class="interlanguage-link-target"><span>Runa Simi</span></a></li><li class="interlanguage-link interwiki-rue mw-list-item"><a href="https://rue.wikipedia.org/wiki/%D0%95%D0%BD%D0%B5%D1%80%D2%91%D1%96%D1%8F" title="Енерґія – rusinsk" lang="rue" hreflang="rue" data-title="Енерґія" data-language-autonym="Русиньскый" data-language-local-name="rusinsk" class="interlanguage-link-target"><span>Русиньскый</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%AD%D0%BD%D0%B5%D1%80%D0%B3%D0%B8%D1%8F" title="Энергия – russisk" lang="ru" hreflang="ru" data-title="Энергия" data-language-autonym="Русский" data-language-local-name="russisk" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sah mw-list-item"><a href="https://sah.wikipedia.org/wiki/%D0%AD%D0%BD%D0%B5%D1%80%D0%B3%D0%B8%D1%8F" title="Энергия – sakha" lang="sah" hreflang="sah" data-title="Энергия" data-language-autonym="Саха тыла" data-language-local-name="sakha" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/Energy" title="Energy – skotsk" lang="sco" hreflang="sco" data-title="Energy" data-language-autonym="Scots" data-language-local-name="skotsk" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Energjia" title="Energjia – albansk" lang="sq" hreflang="sq" data-title="Energjia" data-language-autonym="Shqip" data-language-local-name="albansk" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Enirg%C3%ACa" title="Enirgìa – siciliansk" lang="scn" hreflang="scn" data-title="Enirgìa" data-language-autonym="Sicilianu" data-language-local-name="siciliansk" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B7%81%E0%B6%9A%E0%B7%8A%E0%B6%AD%E0%B7%92%E0%B6%BA" title="ශක්තිය – singalesisk" lang="si" hreflang="si" data-title="ශක්තිය" data-language-autonym="සිංහල" data-language-local-name="singalesisk" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Energy" title="Energy – enkel engelsk" lang="en-simple" hreflang="en-simple" data-title="Energy" data-language-autonym="Simple English" data-language-local-name="enkel engelsk" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sd mw-list-item"><a href="https://sd.wikipedia.org/wiki/%D8%AA%D9%88%D8%A7%D9%86%D8%A7%D8%A6%D9%8A" title="توانائي – sindhi" lang="sd" hreflang="sd" data-title="توانائي" data-language-autonym="سنڌي" data-language-local-name="sindhi" class="interlanguage-link-target"><span>سنڌي</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Energia" title="Energia – slovakisk" lang="sk" hreflang="sk" data-title="Energia" data-language-autonym="Slovenčina" data-language-local-name="slovakisk" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Energija" title="Energija – slovensk" lang="sl" hreflang="sl" data-title="Energija" data-language-autonym="Slovenščina" data-language-local-name="slovensk" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-so mw-list-item"><a href="https://so.wikipedia.org/wiki/Tamar" title="Tamar – somali" lang="so" hreflang="so" data-title="Tamar" data-language-autonym="Soomaaliga" data-language-local-name="somali" class="interlanguage-link-target"><span>Soomaaliga</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D9%88%D8%B2%DB%95" title="وزە – sentralkurdisk" lang="ckb" hreflang="ckb" data-title="وزە" data-language-autonym="کوردی" data-language-local-name="sentralkurdisk" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%95%D0%BD%D0%B5%D1%80%D0%B3%D0%B8%D1%98%D0%B0" title="Енергија – serbisk" lang="sr" hreflang="sr" data-title="Енергија" data-language-autonym="Српски / srpski" data-language-local-name="serbisk" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Energija" title="Energija – serbokroatisk" lang="sh" hreflang="sh" data-title="Energija" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbokroatisk" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-su mw-list-item"><a href="https://su.wikipedia.org/wiki/%C3%89nergi" title="Énergi – sundanesisk" lang="su" hreflang="su" data-title="Énergi" data-language-autonym="Sunda" data-language-local-name="sundanesisk" class="interlanguage-link-target"><span>Sunda</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Energia" title="Energia – finsk" lang="fi" hreflang="fi" data-title="Energia" data-language-autonym="Suomi" data-language-local-name="finsk" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Enerhiya" title="Enerhiya – tagalog" lang="tl" hreflang="tl" data-title="Enerhiya" data-language-autonym="Tagalog" data-language-local-name="tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%86%E0%AE%B1%E0%AF%8D%E0%AE%B1%E0%AE%B2%E0%AF%8D" title="ஆற்றல் – tamil" lang="ta" hreflang="ta" data-title="ஆற்றல்" data-language-autonym="தமிழ்" data-language-local-name="tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-shi mw-list-item"><a href="https://shi.wikipedia.org/wiki/Ta%E1%BA%93%E1%B8%8Da%E1%B9%9Bt" title="Taẓḍaṛt – tachelhit" lang="shi" hreflang="shi" data-title="Taẓḍaṛt" data-language-autonym="Taclḥit" data-language-local-name="tachelhit" class="interlanguage-link-target"><span>Taclḥit</span></a></li><li class="interlanguage-link interwiki-kab mw-list-item"><a href="https://kab.wikipedia.org/wiki/Tafasa" title="Tafasa – kabylsk" lang="kab" hreflang="kab" data-title="Tafasa" data-language-autonym="Taqbaylit" data-language-local-name="kabylsk" class="interlanguage-link-target"><span>Taqbaylit</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%AD%D0%BD%D0%B5%D1%80%D0%B3%D0%B8%D1%8F" title="Энергия – tatarisk" lang="tt" hreflang="tt" data-title="Энергия" data-language-autonym="Татарча / tatarça" data-language-local-name="tatarisk" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%B6%E0%B0%95%E0%B1%8D%E0%B0%A4%E0%B0%BF" title="శక్తి – telugu" lang="te" hreflang="te" data-title="శక్తి" data-language-autonym="తెలుగు" data-language-local-name="telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%9E%E0%B8%A5%E0%B8%B1%E0%B8%87%E0%B8%87%E0%B8%B2%E0%B8%99" title="พลังงาน – thai" lang="th" hreflang="th" data-title="พลังงาน" data-language-autonym="ไทย" data-language-local-name="thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/%D0%AD%D0%BD%D0%B5%D1%80%D0%B3%D0%B8%D1%8F" title="Энергия – tadsjikisk" lang="tg" hreflang="tg" data-title="Энергия" data-language-autonym="Тоҷикӣ" data-language-local-name="tadsjikisk" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Enerji" title="Enerji – tyrkisk" lang="tr" hreflang="tr" data-title="Enerji" data-language-autonym="Türkçe" data-language-local-name="tyrkisk" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-tk mw-list-item"><a href="https://tk.wikipedia.org/wiki/Energi%C3%BDa" title="Energiýa – turkmensk" lang="tk" hreflang="tk" data-title="Energiýa" data-language-autonym="Türkmençe" data-language-local-name="turkmensk" class="interlanguage-link-target"><span>Türkmençe</span></a></li><li class="interlanguage-link interwiki-tyv mw-list-item"><a href="https://tyv.wikipedia.org/wiki/%D0%AD%D0%BD%D0%B5%D1%80%D0%B3%D0%B8%D1%8F" title="Энергия – tuvinsk" lang="tyv" hreflang="tyv" data-title="Энергия" data-language-autonym="Тыва дыл" data-language-local-name="tuvinsk" class="interlanguage-link-target"><span>Тыва дыл</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%95%D0%BD%D0%B5%D1%80%D0%B3%D1%96%D1%8F" title="Енергія – ukrainsk" lang="uk" hreflang="uk" data-title="Енергія" data-language-autonym="Українська" data-language-local-name="ukrainsk" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D8%AA%D9%88%D8%A7%D9%86%D8%A7%D8%A6%DB%8C" title="توانائی – urdu" lang="ur" hreflang="ur" data-title="توانائی" data-language-autonym="اردو" data-language-local-name="urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-ug mw-list-item"><a href="https://ug.wikipedia.org/wiki/%D8%A6%DB%90%D9%86%DB%90%D8%B1%DA%AF%D9%89%D9%8A%DB%95" title="ئېنېرگىيە – uigurisk" lang="ug" hreflang="ug" data-title="ئېنېرگىيە" data-language-autonym="ئۇيغۇرچە / Uyghurche" data-language-local-name="uigurisk" class="interlanguage-link-target"><span>ئۇيغۇرچە / Uyghurche</span></a></li><li class="interlanguage-link interwiki-vec mw-list-item"><a href="https://vec.wikipedia.org/wiki/Enerzia" title="Enerzia – venetiansk" lang="vec" hreflang="vec" data-title="Enerzia" data-language-autonym="Vèneto" data-language-local-name="venetiansk" class="interlanguage-link-target"><span>Vèneto</span></a></li><li class="interlanguage-link interwiki-vep mw-list-item"><a href="https://vep.wikipedia.org/wiki/Energii" title="Energii – vepsisk" lang="vep" hreflang="vep" data-title="Energii" data-language-autonym="Vepsän kel’" data-language-local-name="vepsisk" class="interlanguage-link-target"><span>Vepsän kel’</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/N%C4%83ng_l%C6%B0%E1%BB%A3ng" title="Năng lượng – vietnamesisk" lang="vi" hreflang="vi" data-title="Năng lượng" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamesisk" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-vo mw-list-item"><a href="https://vo.wikipedia.org/wiki/N%C3%A4met" title="Nämet – volapyk" lang="vo" hreflang="vo" data-title="Nämet" data-language-autonym="Volapük" data-language-local-name="volapyk" class="interlanguage-link-target"><span>Volapük</span></a></li><li class="interlanguage-link interwiki-zh-classical mw-list-item"><a href="https://zh-classical.wikipedia.org/wiki/%E8%83%BD%E9%87%8F" title="能量 – klassisk kinesisk" lang="lzh" hreflang="lzh" data-title="能量" data-language-autonym="文言" data-language-local-name="klassisk kinesisk" class="interlanguage-link-target"><span>文言</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Enerhiya" title="Enerhiya – waray-waray" lang="war" hreflang="war" data-title="Enerhiya" data-language-autonym="Winaray" data-language-local-name="waray-waray" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wo mw-list-item"><a href="https://wo.wikipedia.org/wiki/K%C3%A0ttan" title="Kàttan – wolof" lang="wo" hreflang="wo" data-title="Kàttan" data-language-autonym="Wolof" data-language-local-name="wolof" class="interlanguage-link-target"><span>Wolof</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E8%83%BD%E9%87%8F" title="能量 – wu" lang="wuu" hreflang="wuu" data-title="能量" data-language-autonym="吴语" data-language-local-name="wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-ts mw-list-item"><a href="https://ts.wikipedia.org/wiki/Matimba" title="Matimba – tsonga" lang="ts" hreflang="ts" data-title="Matimba" data-language-autonym="Xitsonga" data-language-local-name="tsonga" class="interlanguage-link-target"><span>Xitsonga</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/%D7%A2%D7%A0%D7%A2%D7%A8%D7%92%D7%99%D7%A2" title="ענערגיע – jiddisk" lang="yi" hreflang="yi" data-title="ענערגיע" data-language-autonym="ייִדיש" data-language-local-name="jiddisk" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E8%83%BD%E9%87%8F" title="能量 – kantonesisk" lang="yue" hreflang="yue" data-title="能量" data-language-autonym="粵語" data-language-local-name="kantonesisk" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-bat-smg mw-list-item"><a href="https://bat-smg.wikipedia.org/wiki/Energ%C4%97j%C4%97" title="Energėjė – samogitisk" lang="sgs" hreflang="sgs" data-title="Energėjė" data-language-autonym="Žemaitėška" data-language-local-name="samogitisk" class="interlanguage-link-target"><span>Žemaitėška</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E8%83%BD%E9%87%8F" title="能量 – kinesisk" lang="zh" hreflang="zh" data-title="能量" data-language-autonym="中文" data-language-local-name="kinesisk" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-dtp mw-list-item"><a href="https://dtp.wikipedia.org/wiki/Tinori" title="Tinori – sentraldusun" lang="dtp" hreflang="dtp" data-title="Tinori" data-language-autonym="Kadazandusun" data-language-local-name="sentraldusun" class="interlanguage-link-target"><span>Kadazandusun</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q11379#sitelinks-wikipedia" title="Rediger lenker til artikkelen på andre språk" class="wbc-editpage">Rediger lenker</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Navnerom"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Energi" title="Vis innholdssiden [c]" accesskey="c"><span>Artikkel</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Diskusjon:Energi" rel="discussion" title="Diskusjon om innholdssiden [t]" accesskey="t"><span>Diskusjon</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Bytt språkvariant" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">norsk bokmål</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Visninger"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Energi"><span>Les</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Energi&veaction=edit" title="Rediger siden [v]" accesskey="v"><span>Rediger</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Energi&action=edit" title="Rediger kildekoden for denne siden [e]" accesskey="e"><span>Rediger kilde</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Energi&action=history" title="Tidligere sideversjoner av denne siden [h]" accesskey="h"><span>Vis historikk</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Sideverktøy"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Verktøy" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Verktøy</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Verktøy</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">flytt til sidefeltet</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">skjul</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Flere alternativer" > <div class="vector-menu-heading"> Handlinger </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Energi"><span>Les</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Energi&veaction=edit" title="Rediger siden [v]" accesskey="v"><span>Rediger</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Energi&action=edit" title="Rediger kildekoden for denne siden [e]" accesskey="e"><span>Rediger kilde</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Energi&action=history"><span>Vis historikk</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Generelt </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Spesial:Lenker_hit/Energi" title="Liste over alle wikisider som lenker hit [j]" accesskey="j"><span>Lenker hit</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Spesial:Relaterte_endringer/Energi" rel="nofollow" title="Siste endringer i sider som blir lenket fra denne siden [k]" accesskey="k"><span>Relaterte endringer</span></a></li><li id="t-upload" class="mw-list-item"><a href="//commons.wikimedia.org/wiki/Special:UploadWizard?uselang=no" title="Last opp filer [u]" accesskey="u"><span>Last opp fil</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Spesial:Spesialsider" title="Liste over alle spesialsider [q]" accesskey="q"><span>Spesialsider</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Energi&oldid=24786155" title="Permanent lenke til denne versjonen av siden"><span>Permanent lenke</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Energi&action=info" title="Mer informasjon om denne siden"><span>Sideinformasjon</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Spesial:Siteringshjelp&page=Energi&id=24786155&wpFormIdentifier=titleform" title="Informasjon om hvordan denne siden kan siteres"><span>Siter denne siden</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Spesial:UrlShortener&url=https%3A%2F%2Fno.wikipedia.org%2Fwiki%2FEnergi"><span>Hent forkortet URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Spesial:QrCode&url=https%3A%2F%2Fno.wikipedia.org%2Fwiki%2FEnergi"><span>Last ned QR-kode</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Skriv ut / eksporter </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Spesial:DownloadAsPdf&page=Energi&action=show-download-screen"><span>Last ned som PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Energi&printable=yes" title="Utskriftsvennlig versjon av denne siden [p]" accesskey="p"><span>Utskriftsvennlig versjon</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> På andre prosjekter </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:Energy" hreflang="en"><span>Wikimedia Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q11379" title="Lenke til koblet dataregisterelement [g]" accesskey="g"><span>Wikidata-element</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Sideverktøy"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Utseende"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Utseende</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">flytt til sidefeltet</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">skjul</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Fra Wikipedia, den frie encyklopedi</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="nb" dir="ltr"><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fil:Lightning_over_Oradea_Romania_3.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/13/Lightning_over_Oradea_Romania_3.jpg/250px-Lightning_over_Oradea_Romania_3.jpg" decoding="async" width="250" height="386" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/13/Lightning_over_Oradea_Romania_3.jpg/375px-Lightning_over_Oradea_Romania_3.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/13/Lightning_over_Oradea_Romania_3.jpg/500px-Lightning_over_Oradea_Romania_3.jpg 2x" data-file-width="1935" data-file-height="2989" /></a><figcaption><a href="/wiki/Lyn" title="Lyn">Lynnedslag</a> er en <a href="/wiki/Gnist" class="mw-disambig" title="Gnist">gnist</a>, hvilket er <a href="/wiki/Ion" title="Ion">ionisert</a> <a href="/wiki/Luft" title="Luft">luft</a> og derfor er en midlertidig <a href="/wiki/Plasma_(fysikk)" title="Plasma (fysikk)">plasmakanal</a>. Den elektriske strømmens avsatte energi i plasmaet omsettes til <a href="/wiki/Varme" title="Varme">varme</a>, <a href="/wiki/Mekanisk_energi" title="Mekanisk energi">mekanisk energi</a> (luftmolekylenes bevegelse), <a href="/wiki/Lyd" title="Lyd">akustisk energi</a>, <a href="/wiki/R%C3%B8ntgenstr%C3%A5ling" title="Røntgenstråling">røntgenstråling</a>, <a href="/wiki/Gammastr%C3%A5ling" title="Gammastråling">gammastråling</a> og <a href="/wiki/Lys" title="Lys">lys</a>.</figcaption></figure> <p><b>Energi</b> (fra <a href="/wiki/Gresk" title="Gresk">gresk</a> <i>ενέργεια</i> (<i>energeia</i>), styrke) er evnen til å utføre arbeid, hvor <a href="/wiki/Arbeid_(fysikk)" title="Arbeid (fysikk)">arbeid</a> er definert som <a href="/wiki/Kraft" title="Kraft">kraft</a> anvendt gjennom en strekning. Standard vitenskapelig (<a href="/wiki/SI-systemet" title="SI-systemet">SI</a>) måleenhet for energi er <a href="/wiki/Joule" title="Joule">joule</a> (J). Energi kan også måles i <a href="/wiki/Kalorier" class="mw-redirect" title="Kalorier">kalorier</a> (cal) eller kilokalorier (kcal). I sammenheng med <a href="/wiki/Elektrisitet" title="Elektrisitet">elektrisitet</a> brukes målenheten kilowattimer (<a href="/wiki/KWh" class="mw-redirect" title="KWh">kWh</a>). </p><p>Energi kan ikke bli borte eller oppstå. Dette er uttrykt ved <a href="/wiki/Termodynamikkens_f%C3%B8rste_hovedsetning" title="Termodynamikkens første hovedsetning">termodynamikkens 1. hovedsetning</a>, også omtalt som <a href="/wiki/Energiprinsippet" title="Energiprinsippet">energiprinsippet</a>. Men energi kan opptre i forskjellige former så lenge <a href="/wiki/Termodynamikkens_andre_hovedsetning" title="Termodynamikkens andre hovedsetning">termodynamikkens 2. hovedsetning</a> er oppfylt. </p><p>Uttrykkene energi og kraft har ulik betydning i forskjellige fagfelter. I fysikken fokuseres det på å beskrive denne egenskapen kvantitativt ved en definisjon som gjør det mulig å betrakte energi både som en totaltilstand og som utført arbeid av ulike typer. </p><p>Energi er en fundamental størrelse for ethvert fysisk system. Det er altså uttrykk for et potensial til å utføre mekanisk arbeid eller til å avgi varme. Tidligere ble energi beskrevet i forhold til enkle observerte effekter. For det er alltid slik at når et objekt har forandret seg, er energi blitt utvekslet med omgivelsene. Da man forstod at det som skaper endringene kan <i>lagres</i> i objekter, ble begrepet energi lansert som potensialet for endring samt størrelsen av endringen. </p><p>Slike effekter (både potensielle og realiserte) har mange former. Noen eksempler er </p> <ul><li><a href="/wiki/Kinetisk_energi" title="Kinetisk energi">Kinetisk energi</a> (Bevegelsesenergi) for et tog i fart</li> <li><a href="/wiki/Potensiell_energi" title="Potensiell energi">Potensiell energi</a> (Stillingsenergi) for et lodd som henger over bakken</li> <li><a href="/wiki/Termisk_energi" title="Termisk energi">Termisk energi</a> i en varmtvannstank</li> <li><a href="/wiki/Kjemisk_energi" title="Kjemisk energi">Kjemisk energi</a> i mat</li> <li><a href="/wiki/Elektrokjemisk_energi" title="Elektrokjemisk energi">Elektrokjemisk energi</a> i batterier</li></ul> <p>Det å si at energi er endringen eller potensialet for endring, klarer ikke å beskrive alle forekomster av energi i vår fysiske verden. </p><p>Energi kan både brukes til å frembringe en observerbar endring, eller til å forhindre en observerbar endring. I siste tilfelle er det klart vanskeligere å observere energioverføringen som har funnet sted. Et tikilogramslodd som er festet på en statuearm ser ikke ut til å kreve noe energi mens det henger der, men hvis du selv står og holder loddet er det tydelig at energi kreves. Du føler loddets tyngde om du beveger loddet opp og ned eller holder det i ro. Loddet får potensiell energi når du løfter det opp i jordens tyngdefelt. Når du slipper loddet går <a href="/wiki/Potensiell_energi" title="Potensiell energi">potensiell energi</a> over til kinetisk energi (bevegelsesenergi) etter hvert som det får fart i fallet ned mot bakken. En liten andel av den potensielle energien overføres til luftens molekyler (luftmotstand) slik at disse får større gjennomsnittshastighet som igjen representerer (termisk) energiinnhold som i teorien kan måles som en temperaturøkning. I det loddet treffer bakken, går den kinetiske energien over til termisk energi i bakken. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Enheter">Enheter</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=1" title="Rediger avsnitt: Enheter" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=1" title="Rediger kildekoden til seksjonen Enheter"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="SI_og_tilhørende_enheter"><span id="SI_og_tilh.C3.B8rende_enheter"></span>SI og tilhørende enheter</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=2" title="Rediger avsnitt: SI og tilhørende enheter" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=2" title="Rediger kildekoden til seksjonen SI og tilhørende enheter"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/SI-systemet" title="SI-systemet">SI</a>-enheten for både energi og arbeid er <a href="/wiki/Joule" title="Joule">joule</a> (J), til ære for <a href="/wiki/James_Prescott_Joule" title="James Prescott Joule">James Prescott Joule</a> og hans eksperimenter rundt mekaniske varmeekvivalenter. 1 joule er det samme som 1 <a href="/wiki/Newton_(enhet)" title="Newton (enhet)">newton</a>-<a href="/wiki/Meter" title="Meter">meter</a> eller 1 <a href="/wiki/Kilogram" title="Kilogram">kg</a> <a href="/wiki/Meter" title="Meter">m</a><small><sup>2</sup></small> <a href="/wiki/Sekund" title="Sekund">s</a><small><sup>−2</sup></small>.<sup id="cite_ref-ergo-1_1-0" class="reference"><a href="#cite_note-ergo-1-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>En energienhet som brukes i <a href="/wiki/Partikkelfysikk" title="Partikkelfysikk">partikkelfysikk</a> er <a href="/wiki/Elektronvolt" title="Elektronvolt">elektronvolt</a> (eV). Det er energien som tilføres et <a href="/wiki/Elektron" title="Elektron">elektron</a>, <a href="/wiki/Proton" title="Proton">proton</a> eller annen partikkel med <a href="/wiki/Element%C3%A6rladning" title="Elementærladning">elementærladning</a> når den flytter seg i et <a href="/wiki/Elektrisk_felt" title="Elektrisk felt">elektrisk felt</a> mellom to punkter med spenningsforskjell på 1 V. 1 eV  = 1.602176462×10<small><sup>−19</sup></small> J. </p><p>Det er verd å merke seg at <a href="/wiki/Dreiemoment" title="Dreiemoment">dreiemoment</a>, som gjerne måles i newton-meter (Nm), har samme <a href="/wiki/Dimensjon" title="Dimensjon">dimensjon</a> som energi. Det er ingen tilfeldighet, for et dreiemoment på 1 Nm anvendt over en vinkel på 1 radian (57,2957... grader) krever en energi på nøyaktig 1 Nm = 1 J. </p> <div class="mw-heading mw-heading3"><h3 id="Andre_energienheter">Andre energienheter</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=3" title="Rediger avsnitt: Andre energienheter" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=3" title="Rediger kildekoden til seksjonen Andre energienheter"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>I <a href="/wiki/CGS-systemet" title="CGS-systemet">CGS-systemet</a> er energienheten <a href="/wiki/Erg" title="Erg">erg</a> = <a href="/wiki/Gram" title="Gram">g</a> <a href="/wiki/Centimeter" title="Centimeter">cm</a><small><sup>2</sup></small> <a href="/wiki/Sekund" title="Sekund">s</a><small><sup>−2</sup></small> som er lik 10<small><sup>−7</sup></small> J. En annen utdatert metrisk enhet er liter-atmosfære (= 101.325 J). </p><p>Britisk/Amerikanske enheter for både energi og arbeid er både <a href="/w/index.php?title=Foot-pound&action=edit&redlink=1" class="new" title="Foot-pound (ikke skrevet ennå)">foot-pound</a> (1.3558 J), og <a href="/w/index.php?title=British_thermal_unit&action=edit&redlink=1" class="new" title="British thermal unit (ikke skrevet ennå)">British thermal unit</a> (Btu) som har ulike verdier rundt 1055 J, og <a href="/wiki/Hestekraft" title="Hestekraft">hestekraft</a>-timer (2.6845 MJ). </p><p>Energienheten som brukes til daglig, spesielt på strømregningen, er kilowattimer (kWh). En kWh er lik 3,6×10<small><sup>6</sup></small> J (eller 3600 kJ eller 3,6 MJ). </p><p><a href="/wiki/Kalori" title="Kalori">Kalori</a> er den tradisjonelle energienheten innenfor næringsmidler og er varmeenergien som trengs for å varme opp ett gram vann 1 grad celsius (eller mer korrekt 1 kelvin) ved et trykk på 1 <a href="/wiki/Atmosf%C3%A6re" title="Atmosfære">atm</a>. Varmemengden avhenger av starttemperaturen på vannet. Derfor varierer kalorienheten litt, men ligger på ca. 4,186 J. Det er vanlig å oppgi matvarers energiinnhold pr. 100 g vare. F.eks. har 100 g <a href="/wiki/Helmelk" title="Helmelk">helmelk</a> typisk energiinnholdet 66 kcal = 277 kJ (eller 0,277 MJ/kg). </p> <div class="mw-heading mw-heading2"><h2 id="Energioverføring"><span id="Energioverf.C3.B8ring"></span>Energioverføring</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=4" title="Rediger avsnitt: Energioverføring" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=4" title="Rediger kildekoden til seksjonen Energioverføring"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Arbeid">Arbeid</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=5" title="Rediger avsnitt: Arbeid" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=5" title="Rediger kildekoden til seksjonen Arbeid"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Arbeid_(fysikk)" title="Arbeid (fysikk)">Arbeid</a> er energi anvendt til å utøve en kraft mot et legeme for å flytte dette. Det betegnes vanligvis med symbolet <i>W</i> (for <i>work</i>) og er gitt ved den matematiske definisjonen </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle W=\int \mathbf {F} \cdot d\mathbf {s} }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>W</mi> <mo>=</mo> <mo>∫</mo> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="bold">F</mi> </mrow> <mo>⋅</mo> <mi>d</mi> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="bold">s</mi> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle W=\int \mathbf {F} \cdot d\mathbf {s} }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/bbfe58ddb9b44209644a8abd0af5858fd9b03d63" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.338ex; width:13.748ex; height:5.676ex;" alt="{\displaystyle W=\int \mathbf {F} \cdot d\mathbf {s} }"></span></dd></dl> <p>Her inngår <a href="/wiki/Skalarprodukt" class="mw-redirect" title="Skalarprodukt">skalarproduktet</a> av kraften <b>F</b> utøvd mot <a href="/wiki/Tyngdepunkt" class="mw-redirect" title="Tyngdepunkt">tyngdepunktet</a> til objektet og en infinitesimal forflytning <i>d</i><b>s</b>, integrert over hele forflytningen. </p><p>Arbeid forbruker energi slik at kraft-forflytningen vil stoppe opp når tilgjengelig energi er oppbrukt. </p><p>I de enkleste beskrivelser antas dette å være samme størrelse som arbeidet som utøves på det aktuelle objektet. I virkeligheten vil ikke all energi forbrukt (som beskrevet ved likningen) overføres til en gjenvinnbar energiform. F.eks. vil noe av energien gå over til varme som ikke kan gjenvinnes til annen nyttig energi. Energimengden i et system som kan brukes til å utføre et arbeid er altså langt mindre enn den totale energimengden i systemet. Den delen som kan brukes til å utføre arbeid kalles <a href="/wiki/Eksergi" title="Eksergi">eksergi</a>, mens resten kalles <a href="/wiki/Anergi" title="Anergi">anergi</a>. </p> <div class="mw-heading mw-heading3"><h3 id="Varme">Varme</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=6" title="Rediger avsnitt: Varme" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=6" title="Rediger kildekoden til seksjonen Varme"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Varme" title="Varme">Varme</a> er energimengden som er knyttet til en temperaturendring eller faseendring (smelting/fordampning og størkning/kondensasjon). I kjemi er en opptatt av varme som forbrukes eller frigjøres gjennom kjemiske reaksjoner. Forholdet mellom varme og energi har en parallell til forholdet mellom arbeid og energi. Varme strømmer fra områder med "høy" <a href="/wiki/Temperatur" title="Temperatur">temperatur</a> til områder med "lav" temperatur. Alle objekter har en viss mengde intern energi som er knyttet til de tilfeldige bevegelsene av atomene og molekylene. Denne energien en positivt korrelert til temperaturen i objektet. For hver fase er sammenhengen tilnærmet lineær. Når to objekter kommer i termisk kontakt, vil de utveksle varme helt til temperaturene er like. Mengden av energi overført er mengden av energi utvekslet. Det er vanlig å forveksle varme med intern energi, men det er en viss forskjell: Endringen i intern energi er summen av varme tilført og arbeid utført fra omgivelsene. </p> <div class="mw-heading mw-heading2"><h2 id="Energibevarelse">Energibevarelse</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=7" title="Rediger avsnitt: Energibevarelse" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=7" title="Rediger kildekoden til seksjonen Energibevarelse"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Energiprinsippet" title="Energiprinsippet">Energiprinsippet</a> eller som det også kalles <a href="/wiki/Termodynamikkens_f%C3%B8rste_hovedsetning" title="Termodynamikkens første hovedsetning">termodynamikkens første hovedsetning</a> sier at energien som tilføres et system er lik energien som avgis fra systemet pluss energiendringen i systemet. Denne loven brukes i alle deler av fysikken. <a href="/wiki/Noethers_setning" title="Noethers setning">Noethers theorem</a> relaterer energibevarelse til tidsinvariansen av fysiske lover som for eksempel formulert ved bruk av <a href="/wiki/Lagrangemekanikk" class="mw-redirect" title="Lagrangemekanikk">Lagrange-mekanikk</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Kinetisk_energi">Kinetisk energi</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=8" title="Rediger avsnitt: Kinetisk energi" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=8" title="Rediger kildekoden til seksjonen Kinetisk energi"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Kinetisk_energi" title="Kinetisk energi">Kinetisk energi</a> (bevegelsesenergi) er den delen av et systems energi som er relatert til bevegelse. For et objekt med hastighet <b>v</b> og <a href="/wiki/Bevegelsesmengde" title="Bevegelsesmengde">bevegelsesmengde</a> <b>p</b> er den gitt ved det matematisk uttrykket </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle K=\int \mathbf {v} \cdot d\mathbf {p} }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>K</mi> <mo>=</mo> <mo>∫</mo> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="bold">v</mi> </mrow> <mo>⋅</mo> <mi>d</mi> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="bold">p</mi> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle K=\int \mathbf {v} \cdot d\mathbf {p} }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/5c0384596475b6330402319570d015117ea8efdf" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.338ex; width:13.536ex; height:5.676ex;" alt="{\displaystyle K=\int \mathbf {v} \cdot d\mathbf {p} }"></span></dd></dl> <p>I skalarproduktet inngår den infinitesemale forandringen <i>d</i><b>p</b> av bevegelsesmengden, integrert over hele bevegelsen til objektet.<sup id="cite_ref-YF_2-0" class="reference"><a href="#cite_note-YF-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>Ved ikke-relativisiske hastigheter, dvs. hastigheter som er mye lavere enn <a href="/wiki/Lyshastigheten" class="mw-redirect" title="Lyshastigheten">lyshastigheten</a>, kan man bruke den <a href="/wiki/Kinetisk_energi" title="Kinetisk energi">newtonske tilnærmelsen</a> </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle K={\begin{matrix}{\frac {1}{2}}\end{matrix}}mv^{2}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>K</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mn>1</mn> <mn>2</mn> </mfrac> </mrow> </mtd> </mtr> </mtable> </mrow> <mi>m</mi> <msup> <mi>v</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle K={\begin{matrix}{\frac {1}{2}}\end{matrix}}mv^{2}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/ec039eab68378e48f604a0bf3a25b704bdaec62e" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.968ex; margin-bottom: -0.203ex; width:11.796ex; height:3.509ex;" alt="{\displaystyle K={\begin{matrix}{\frac {1}{2}}\end{matrix}}mv^{2}}"></span></dd></dl> <p>hvor <i>m</i> er legemets masse. Ved hastigheter som nærmer seg lysets, må man benytte den <a href="/wiki/Spesiell_relativitetsteori" class="mw-redirect" title="Spesiell relativitetsteori">relativistiske formelen</a> </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle K=mc^{2}(\gamma -1)=\gamma mc^{2}-mc^{2}\;\!}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>K</mi> <mo>=</mo> <mi>m</mi> <msup> <mi>c</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> <mo stretchy="false">(</mo> <mi>γ</mi> <mo>−</mo> <mn>1</mn> <mo stretchy="false">)</mo> <mo>=</mo> <mi>γ</mi> <mi>m</mi> <msup> <mi>c</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> <mo>−</mo> <mi>m</mi> <msup> <mi>c</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> <mspace width="thickmathspace" /> <mspace width="negativethinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle K=mc^{2}(\gamma -1)=\gamma mc^{2}-mc^{2}\;\!}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/896a322f63edf366e577bfc8e51fbe742756eaaf" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; margin-right: -0.387ex; width:32.39ex; height:3.176ex;" alt="{\displaystyle K=mc^{2}(\gamma -1)=\gamma mc^{2}-mc^{2}\;\!}"></span></dd></dl> <p>hvor </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \gamma ={\frac {1}{\sqrt {1-(v/c)^{2}}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>γ</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mn>1</mn> <msqrt> <mn>1</mn> <mo>−</mo> <mo stretchy="false">(</mo> <mi>v</mi> <mrow class="MJX-TeXAtom-ORD"> <mo>/</mo> </mrow> <mi>c</mi> <msup> <mo stretchy="false">)</mo> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> </msqrt> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \gamma ={\frac {1}{\sqrt {1-(v/c)^{2}}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/2cd8989942d56291d999af7a46fb6a55b0009b64" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -3.171ex; width:17.684ex; height:6.509ex;" alt="{\displaystyle \gamma ={\frac {1}{\sqrt {1-(v/c)^{2}}}}}"></span></dd></dl> <p>avhenger av lyshastighten <i>c</i> = 299 792 458 m/s. Det betyr at totalenergien til legemet er <i>γmc</i><sup>2</sup>, mens delen <i>mc</i><sup>2</sup> er dets energi når det er i ro. Dette blir også kalt for «hvilemasseenergien» bestemt ved <a href="/wiki/Masseenergiloven" title="Masseenergiloven">masseenergiloven</a> til <a href="/wiki/Einstein" class="mw-redirect" title="Einstein">Einstein</a>. </p><p>I form av en <a href="/wiki/Taylorrekke" title="Taylorrekke">Taylor-rekke</a> kan den relativistiske formelen skrives: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle K={\frac {1}{2}}mv^{2}-{\frac {3}{8}}{\frac {mv^{4}}{c^{2}}}+\cdots }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>K</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mn>1</mn> <mn>2</mn> </mfrac> </mrow> <mi>m</mi> <msup> <mi>v</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> <mo>−</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mn>3</mn> <mn>8</mn> </mfrac> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <mi>m</mi> <msup> <mi>v</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>4</mn> </mrow> </msup> </mrow> <msup> <mi>c</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> </mfrac> </mrow> <mo>+</mo> <mo>⋯</mo> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle K={\frac {1}{2}}mv^{2}-{\frac {3}{8}}{\frac {mv^{4}}{c^{2}}}+\cdots }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/1e550e339f617b22af5cf14ebdd5a76a85d7f605" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.171ex; width:26.846ex; height:6.009ex;" alt="{\displaystyle K={\frac {1}{2}}mv^{2}-{\frac {3}{8}}{\frac {mv^{4}}{c^{2}}}+\cdots }"></span></dd></dl> <p>Herav kan en si at ledd av 2. orden og høyere svarer til unøyaktigheten i den newtonske tilnærmelse for kinetisk energi i forhold til den relativistiske formelen. </p> <div class="mw-heading mw-heading2"><h2 id="Potensiell_energi">Potensiell energi</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=9" title="Rediger avsnitt: Potensiell energi" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=9" title="Rediger kildekoden til seksjonen Potensiell energi"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Potensiell_energi" title="Potensiell energi">Potensiell energi</a> er den delen av et systems energi som er relatert til den romlige fordeling av systemets komponenter og deres interne vekselvirkning. I et tenkt isolert system av to stasjonære objekter med avstand <b>r</b> og som utøver en kraft <b>F</b> på hverandre, er systemets potensielle energi definert ved </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle V(\mathbf {r} )=-\int _{\mathbf {r} _{0}}^{\mathbf {r} }\mathbf {F} \cdot d\mathbf {r} }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>V</mi> <mo stretchy="false">(</mo> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="bold">r</mi> </mrow> <mo stretchy="false">)</mo> <mo>=</mo> <mo>−</mo> <msubsup> <mo>∫</mo> <mrow class="MJX-TeXAtom-ORD"> <msub> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="bold">r</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>0</mn> </mrow> </msub> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="bold">r</mi> </mrow> </mrow> </msubsup> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="bold">F</mi> </mrow> <mo>⋅</mo> <mi>d</mi> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="bold">r</mi> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle V(\mathbf {r} )=-\int _{\mathbf {r} _{0}}^{\mathbf {r} }\mathbf {F} \cdot d\mathbf {r} }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/455549fe96062e57db5ecfce72bc1a8360089142" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.671ex; width:19.535ex; height:6.176ex;" alt="{\displaystyle V(\mathbf {r} )=-\int _{\mathbf {r} _{0}}^{\mathbf {r} }\mathbf {F} \cdot d\mathbf {r} }"></span></dd></dl> <p>hvor den nederste grensen i integralet er en referanseavstand <b>r</b><sub>0</sub> som den potensielle energien blir målt i forhold til. Vanligvis avhenger kraften av avstanden og integrasjonen tas langs banen som beskriver bevegelsen.<sup id="cite_ref-YF_2-1" class="reference"><a href="#cite_note-YF-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>For et <a href="/wiki/Potensiell_energi#Konservative_krefter" title="Potensiell energi">konservativt potensial</a> er integralet uavhengig av denne banen. Da følger det fra definisjonen at kraften kan finnes direkte fra potensialet ved å beregne <a href="/wiki/Gradient" title="Gradient">gradienten</a>, </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \mathbf {F} =-{\boldsymbol {\nabla }}V}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="bold">F</mi> </mrow> <mo>=</mo> <mo>−</mo> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="bold">∇</mi> </mrow> <mi>V</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \mathbf {F} =-{\boldsymbol {\nabla }}V}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/e59d8295829fdf5076d4a581d63330f01e4d862f" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.505ex; width:10.603ex; height:2.343ex;" alt="{\displaystyle \mathbf {F} =-{\boldsymbol {\nabla }}V}"></span></dd></dl> <p>Denne relasjonen viser at kraften mellom objektene virker i retning av minskende potensiell energi, og at størrelsen av kraften er proporsjonal med graden av reduksjon av den potensielle energien. </p><p>Disse to relasjonene, definisjonen av potensiell energi basert på kraft, og kraftens avhengighet av den potensielle energien, viser at begrepene kraft og potensiell energi er sterkt koplet. Hvis to objekter ikke øver noen kraft på hverandre, så er det ingen potensiell energi mellom dem. Hvis to objekter derimot øver en kraft på hverandre, så vil den potensielle energien oppstå naturlig i systemet som en del av dets totale energi. Siden potensiell energi er relatert til krefter, vil en endring i et systems romlige komponentfordeling enten øke eller minske systemets potensielle energi. Når et system endrer tilstand til lavere potensiell energi, så blir energi av en eller annen form frigjort, f.eks. kinetisk energi. </p> <div class="mw-heading mw-heading3"><h3 id="Gravitasjonsenergi">Gravitasjonsenergi</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=10" title="Rediger avsnitt: Gravitasjonsenergi" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=10" title="Rediger kildekoden til seksjonen Gravitasjonsenergi"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>En masse som slippes et stykke over jordoverflaten har i utgangspunktet en gravitasjonsenergi som er potensiell energi relatert til tyngdekraften fra jorden. Denne energien blir transformert til kinetisk energi ved at tyngdekraften virker på massen, og den potensielle energien reduseres tilsvarende i fallet. I homogent tyngdefelt er potensiell energi gitt ved <span class="nowrap"><i>V</i> = <i>mgh</i></span>.<sup id="cite_ref-ergo-1_1-1" class="reference"><a href="#cite_note-ergo-1-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>hvor <i>m</i> er massen, <i>h</i> er høyden (dvs. avstanden over jordoverflaten) og <i>g</i> er <a href="/wiki/Tyngdeakselerasjonen" class="mw-redirect" title="Tyngdeakselerasjonen">tyngdeakselerasjonen</a>. </p><p>Denne formelen stemmer <i>kun</i> når vi snakker om et homogent gravitasjonsfelt, der det er lik gravitasjon over alt i dette feltet. Jordas gravitasjonsfelt ved jordoverflaten er tilnærmet homogent, men endrer seg hvis vi beveger oss langt vekk fra overflaten, f.eks. på månen. Da må vi bruke <a href="/wiki/Newtons_gravitasjonslov" title="Newtons gravitasjonslov">Newtons gravitasjonslov</a> som gir potensiell energi </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle V=-G{\frac {Mm}{r}}\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>V</mi> <mo>=</mo> <mo>−</mo> <mi>G</mi> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <mi>M</mi> <mi>m</mi> </mrow> <mi>r</mi> </mfrac> </mrow> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle V=-G{\frac {Mm}{r}}\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/7757673c83f82c76d16f81c42949393713058321" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.838ex; width:14.226ex; height:5.176ex;" alt="{\displaystyle V=-G{\frac {Mm}{r}}\,}"></span></dd></dl> <p>der <i>M</i> er jordens masse, <i>r</i> er avstand til jordens sentrum, <i>m</i> er gjenstandens massen og <i>G</i> er <a href="/wiki/Gravitasjonskonstanten" class="mw-redirect" title="Gravitasjonskonstanten">gravitasjonskonstanten</a>, </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle G=(6,6742\pm 0,001)\times 10^{-11}{\text{N}}{\text{m}}^{2}{\text{kg}}^{-2}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>G</mi> <mo>=</mo> <mo stretchy="false">(</mo> <mn>6</mn> <mo>,</mo> <mn>6742</mn> <mo>±</mo> <mn>0</mn> <mo>,</mo> <mn>001</mn> <mo stretchy="false">)</mo> <mo>×</mo> <msup> <mn>10</mn> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> <mn>11</mn> </mrow> </msup> <mrow class="MJX-TeXAtom-ORD"> <mtext>N</mtext> </mrow> <msup> <mrow class="MJX-TeXAtom-ORD"> <mtext>m</mtext> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> <msup> <mrow class="MJX-TeXAtom-ORD"> <mtext>kg</mtext> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> <mn>2</mn> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle G=(6,6742\pm 0,001)\times 10^{-11}{\text{N}}{\text{m}}^{2}{\text{kg}}^{-2}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/c859095e8bc5379995f5a1cf3c939eb5af95a03c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:39.881ex; height:3.176ex;" alt="{\displaystyle G=(6,6742\pm 0,001)\times 10^{-11}{\text{N}}{\text{m}}^{2}{\text{kg}}^{-2}}"></span></dd></dl> <p>Ved sterk gravitasjon, f.eks. nær et <a href="/wiki/Sort_hull" title="Sort hull">sort hull</a>, eller ved høye hastigheter gjelder ikke lenger Newtons formler og <a href="/wiki/Generell_relativitetsteori" class="mw-redirect" title="Generell relativitetsteori">Generell relativitetsteori</a> må brukes isteden. </p><p>En <a href="/wiki/Pendel" title="Pendel">pendel</a> er en god illustrasjon på energikonvertering og energibevarelse. På sitt høyeste punkt er den kinetiske energien null og den potensielle energien har maksimal verdi. På laveste punkt er den kinetiske energien på sitt maksimum, mens den potensielle energi er null. Maksimalverdiene (totalenergien) av de to energiformene er den samme. Hvis en tenker seg en idealsituasjon hvor det ikke er <a href="/wiki/Friksjon" title="Friksjon">friksjonskrefter</a> til stede, vil energien bevares og pendelen vil svinge evig mellom de to energiformene. </p> <div class="mw-heading mw-heading3"><h3 id="Andre_eksempler">Andre eksempler</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=11" title="Rediger avsnitt: Andre eksempler" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=11" title="Rediger kildekoden til seksjonen Andre eksempler"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>Elastisk energi</li> <li><a href="/wiki/Kjemisk_energi" title="Kjemisk energi">Kjemisk energi</a></li> <li><a href="/wiki/Elektrostatikk" title="Elektrostatikk">Elektrisk feltenergi</a></li> <li><a href="/wiki/Atomkraft" class="mw-redirect" title="Atomkraft">Atomenergi</a></li> <li><a href="/wiki/Masseenergiloven" title="Masseenergiloven">Hvilemasse-energi</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Energi_som_tilstandsvariabel">Energi som tilstandsvariabel</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=12" title="Rediger avsnitt: Energi som tilstandsvariabel" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=12" title="Rediger kildekoden til seksjonen Energi som tilstandsvariabel"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Energi er en karakteristisk egenskap for et systems tilstand. Hvis systemets komponenter endrer sammenstilling som så senere gjenopprettes, så vil systemet ha samme energi som i utgangspunktet. For at dette skal være oppfylt, må alle influerende krefter være <a href="/wiki/Potensiell_energi#Konservative_krefter" title="Potensiell energi">konservative</a>. Det betyr at kreftene er funksjoner av enkeltkomponenters posisjoner og ikke noe annet. Når energi blir borte fra systemet, er dette forårsaket av «ikke-konservative krefter». Typisk eksempel på slike er <a href="/wiki/Friksjon" title="Friksjon">friksjon</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Kjemisk_energi">Kjemisk energi</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=13" title="Rediger avsnitt: Kjemisk energi" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=13" title="Rediger kildekoden til seksjonen Kjemisk energi"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Kjemisk energi er en type potensiell energi relatert til den strukturelle sammensettingen av atomer eller molekyler. Denne sammensetningen kan komme av <a href="/wiki/Kjemisk_binding" title="Kjemisk binding">kjemiske bindinger</a> i for eksempel et molekyl. Kjemisk energi i et stoff kan omformes til andre former for energi gjennom en <a href="/wiki/Kjemisk_reaksjon" title="Kjemisk reaksjon">kjemisk reaksjon</a>. For eksempel ved forbrenning blir den kjemiske energien omgjort til <a href="/wiki/Varme" title="Varme">varme</a>, og det samme er tilfellet med fordøying av mat i biologiske organismer. Grønne planter omformer solenergi til kjemisk energi gjennom en prosess <a href="/wiki/Fotosyntese" title="Fotosyntese">fotosyntese</a>, og elektrisk energi kan omformes til kjemiske energi gjennom <a href="/wiki/Elektrokjemi" title="Elektrokjemi">elektrokjemiske</a> reaksjoner.<sup id="cite_ref-Tipler_3-0" class="reference"><a href="#cite_note-Tipler-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>Begrepet <a href="/wiki/Kjemisk_potensial" title="Kjemisk potensial">kjemisk potensial</a> blir brukt innenfor kjemien for å indikere potensialet et stoff har for å gjennomgå en kjemisk reaksjon. Den <a href="/wiki/Indre_energi" title="Indre energi">indre energi</a> for et kjemisk stoff består av kinetisk energi knyttet til bevegelsene av molekyler samt potensiell energi knyttet til rotasjoner og vibrasjoner av atomene som molekylene består av. Indre energi er en målbar tilstandsvariabel for et system. </p> <div class="mw-heading mw-heading2"><h2 id="Nukleær_potensiell_energi"><span id="Nukle.C3.A6r_potensiell_energi"></span>Nukleær potensiell energi</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=14" title="Rediger avsnitt: Nukleær potensiell energi" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=14" title="Rediger kildekoden til seksjonen Nukleær potensiell energi"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Nukleær, potensiell energi er den potensielle energien til <a href="/wiki/Nukleon" title="Nukleon">kjernepartikler</a> i en <a href="/wiki/Atomkjerne" title="Atomkjerne">atomkjerne</a>, der enkelte av partiklene har elektrisk lading. Denne formen for potensiell energi er forskjellig fra de to andre elektriske potensielle energiformene, på den måten at de ladde partiklene er det ekstremt nært hverandre. Kjernepartiklene er knyttet sammen av sterke nukleære krefter. Svake nukleære krefter gir den potensielle energien for visse typer av radioaktiv nedbryting, slik som <a href="/wiki/Betahenfall" title="Betahenfall">betanedbryting</a>.<sup id="cite_ref-Brehm_4-0" class="reference"><a href="#cite_note-Brehm-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p><p>Kjernepartikler som protoner og nøytroner blir ikke ødelagt i <a href="/wiki/Kjernefysisk_fisjon" title="Kjernefysisk fisjon">fisjon</a>- og <a href="/wiki/Kjernefysisk_fusjon" title="Kjernefysisk fusjon">fusjonsprosesser</a>, men samlinger av dem har mindre masse enn de individuelle partiklene hver for seg, denne masseforskjellen blir frigitt som varme og stråling i kjernereaksjoner. Energien fra Solen, altså <a href="/wiki/Solenergi" title="Solenergi">solenergi</a>, er et eksempel på denne formen for energiomforming. I <a href="/wiki/Solen" title="Solen">Solen</a> fusjonerer hydrogen og rundt 4 millioner tonn av solens masse blir transformert til lys hvert sekund. Lyset stråler ut i verdensrommet i alle retninger. </p> <div class="mw-heading mw-heading2"><h2 id="Se_også"><span id="Se_ogs.C3.A5"></span>Se også</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=15" title="Rediger avsnitt: Se også" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=15" title="Rediger kildekoden til seksjonen Se også"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Entalpi" title="Entalpi">Entalpi</a></li> <li><a href="/wiki/Entropi" title="Entropi">Entropi</a></li> <li><a href="/wiki/Termodynamikk" title="Termodynamikk">Termodynamikk</a></li> <li><a href="/wiki/Energikilde" title="Energikilde">Energikilde</a></li> <li><a href="/wiki/Energiprinsippet" title="Energiprinsippet">Energiloven</a></li> <li><a href="/wiki/Energi_i_Norge" title="Energi i Norge">Energi i Norge</a></li> <li><a href="/wiki/Energikrise" title="Energikrise">Energikrise</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Referanser">Referanser</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=16" title="Rediger avsnitt: Referanser" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=16" title="Rediger kildekoden til seksjonen Referanser"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-ergo-1-1"><b>^</b> <a href="#cite_ref-ergo-1_1-0"><sup>a</sup></a> <a href="#cite_ref-ergo-1_1-1"><sup>b</sup></a> <span class="reference-text">N.P. Callin, C.W. Tellefsen, S. Haagensen, J. Pålsgård og R. Stadsnes, <i>ERGO Fysikk 1</i>, Aschehoug, Oslo (2007). <a href="/wiki/Spesial:Bokkilder/9788203335051" class="internal mw-magiclink-isbn">ISBN 9788203335051</a>.</span> </li> <li id="cite_note-YF-2"><b>^</b> <a href="#cite_ref-YF_2-0"><sup>a</sup></a> <a href="#cite_ref-YF_2-1"><sup>b</sup></a> <span class="reference-text">H.D. Young and R.A. Freedman, <i>University Physics</i>, Addison Wesley, New York (2008). <a href="/wiki/Spesial:Bokkilder/9780321501301" class="internal mw-magiclink-isbn">ISBN 978-0-321-50130-1</a>.</span> </li> <li id="cite_note-Tipler-3"><b><a href="#cite_ref-Tipler_3-0">^</a></b> <span class="reference-text">P. Tipler, <i>Physics for Scientists and Engineers</i>, W. H. Freeman, New York (2004). <a href="/wiki/Spesial:Bokkilder/0716708094" class="internal mw-magiclink-isbn">ISBN 0-7167-0809-4</a>.</span> </li> <li id="cite_note-Brehm-4"><b><a href="#cite_ref-Brehm_4-0">^</a></b> <span class="reference-text">J.J. Brehm and W.J. Mullen, <i>Introduction to the Structure of Matter</i>, John Wiley & Sons, New York (1989). <a href="/wiki/Spesial:Bokkilder/0471612731" class="internal mw-magiclink-isbn">ISBN 0-471-61273-1</a>.</span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Litteratur">Litteratur</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=17" title="Rediger avsnitt: Litteratur" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=17" title="Rediger kildekoden til seksjonen Litteratur"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Richard_Feynman" title="Richard Feynman">Feynman, Richard</a>: <i>Six Easy Pieces: Essentials of Physics Explained by Its Most Brilliant Teacher</i>. Helix Book. Se kapittelet «conservation of energy» for Feynmans forklaring om hva energi er og hvordan vi skal betrakte energi.</li> <li><a href="/wiki/Albert_Einstein" title="Albert Einstein">Einstein, Albert</a> (1952): <i>Relativity: The Special and the General Theory (Fifteenth Edition)</i>. <a href="/wiki/Spesial:Bokkilder/0517884410" class="internal mw-magiclink-isbn">ISBN 0-517-88441-0</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Eksterne_lenker">Eksterne lenker</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Energi&veaction=edit&section=18" title="Rediger avsnitt: Eksterne lenker" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Energi&action=edit&section=18" title="Rediger kildekoden til seksjonen Eksterne lenker"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><span class="bjeller languageicon" style="color: var(--color-subtle, #54595d);cursor:help;" title="engelsk">(en)</span> <a href="https://commons.wikimedia.org/wiki/Category:Energy" class="extiw" title="commons:Category:Energy">Energy</a> – kategori av bilder, video eller lyd på <a href="/wiki/Wikimedia_Commons" title="Wikimedia Commons">Commons</a> <span class="noprint plainlinks wikidata-linkback wd_p373"><span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q11379?uselang=nb#P373" title="Rediger på Wikidata"><img alt="Rediger på Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></span></li> <li><a href="/wiki/International_Energy_Agency" class="mw-redirect" title="International Energy Agency">International Energy Agency</a>, OECD, Paris</li> <li><a rel="nofollow" class="external text" href="http://ec.europa.eu/energy/intelligent/ieea/index_en.htm">Intelligent Energy Executive Agency</a>, EU.</li> <li><a rel="nofollow" class="external text" href="http://www.ssb.no/energi/">Statistisk sentralbyrå: Energi</a></li> <li><a rel="nofollow" class="external text" href="http://www.energy.ca.gov/glossary/">Glossary of Energy Terms</a></li> <li><a rel="nofollow" class="external text" href="http://geni.org/globalenergy/library/national_energy_grid/">National Energy Grid Library</a> – Global Energy Network Institute.</li></ul> <div class="navbox-styles"><style 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