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href="https://web.archive.org/web/20210418152747/https://phys.org/tags/electricity/">electricity</a> 路 <a href="https://web.archive.org/web/20210418152747/https://phys.org/tags/energy+consumption/">energy consumption</a> 路 <a href="https://web.archive.org/web/20210418152747/https://phys.org/tags/renewable+energy/">renewable energy</a> 路 <a href="https://web.archive.org/web/20210418152747/https://phys.org/tags/energy+efficiency/">energy efficiency</a> 路 <a href="https://web.archive.org/web/20210418152747/https://phys.org/tags/fossil+fuels/">fossil fuels</a> </div> <hr> </div> <div class="row"> <div class="col-12"> <div class="sorted-news-list px-3"> <article class="sorted-article"> <div class="d-flex"> <figure class="sorted-article-figure"> <a href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-high-index-surfaces-exposed-nanodendrites-orr.html"> <img data-src="https://web.archive.org/web/20210418152747/https://scx1.b-cdn.net/csz/news/175u/2021/highindexsur.jpg" src="data:image/gif;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=" alt=""> </a> </figure> <div class="sorted-article-content d-flex flex-column ie-flex-1"> <h3 class="mb-1 mb-lg-2"><a class="news-link" href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-high-index-surfaces-exposed-nanodendrites-orr.html">High index surfaces-exposed nanodendrites as ORR electrocatalyst</a></h3> <p class="mb-1 pr-1"> Alloying is a general and efficient strategy to boost the catalytic activity of Pt catalysts toward oxygen reduction reaction (ORR) through electronic and geometric effects. Besides, high-index surfaces (HISs) of Pt also ... </p> </div> </div> <div class="article__info mt-lg-3 mt-2"> <div class="article__info-item mr-auto"> <div class="text-low text-uppercase"> <p> Materials Science </p> </div> </div> <div class="article__info-item mr-3"> <span class="mr-3"></span> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_clock" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"> Apr 09, 2021 </p> </div> <div class="article__info-item mr-3"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_comment" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>0</span></p> </div> <div class="article__info-item"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_share" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>8</span></p> </div> </div> </article> <article class="sorted-article"> <div class="d-flex"> <figure class="sorted-article-figure"> <a href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-birds-blood-functions-winter.html"> <img data-src="https://web.archive.org/web/20210418152747/https://scx1.b-cdn.net/csz/news/175u/2021/birdsbloodfu.jpg" src="data:image/gif;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=" alt=""> </a> </figure> <div class="sorted-article-content d-flex flex-column ie-flex-1"> <h3 class="mb-1 mb-lg-2"><a class="news-link" href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-birds-blood-functions-winter.html">Birds' blood functions as heating system in winter</a></h3> <p class="mb-1 pr-1"> Researchers at Lund University in Sweden have discovered that bird blood produces more heat in winter, when it is colder, than in autumn. The study is published in The FASEB Journal. </p> </div> </div> <div class="article__info mt-lg-3 mt-2"> <div class="article__info-item mr-auto"> <div class="text-low text-uppercase"> <p> Plants & Animals </p> </div> </div> <div class="article__info-item mr-3"> <span class="mr-3"></span> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_clock" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"> Apr 09, 2021 </p> </div> <div class="article__info-item mr-3"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_comment" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>0</span></p> </div> <div class="article__info-item"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_share" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>1359</span></p> </div> </div> </article> <article class="sorted-article"> <div class="d-flex"> <figure class="sorted-article-figure"> <a href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-neutron-energies-asteroid-deflection.html"> <img data-src="https://web.archive.org/web/20210418152747/https://scx1.b-cdn.net/csz/news/175u/2021/differentneu.jpg" src="data:image/gif;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=" alt=""> </a> </figure> <div class="sorted-article-content d-flex flex-column ie-flex-1"> <h3 class="mb-1 mb-lg-2"><a class="news-link" href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-neutron-energies-asteroid-deflection.html">Different neutron energies enhance asteroid deflection</a></h3> <p class="mb-1 pr-1"> A research collaboration between Lawrence Livermore National Laboratory (LLNL) and the Air Force Institute of Technology (AFIT) investigates how the neutron energy output from a nuclear device detonation can affect the deflection ... </p> </div> </div> <div class="article__info mt-lg-3 mt-2"> <div class="article__info-item mr-auto"> <div class="text-low text-uppercase"> <p> Astronomy </p> </div> </div> <div class="article__info-item mr-3"> <span class="mr-3"></span> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_clock" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"> Apr 09, 2021 </p> </div> <div class="article__info-item mr-3"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_comment" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>6</span></p> </div> <div class="article__info-item"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_share" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>7246</span></p> </div> </div> </article> <article class="sorted-article"> <div class="d-flex"> <figure class="sorted-article-figure"> <a href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-green-chemistry-biofuel-mechanism-key.html"> <img data-src="https://web.archive.org/web/20210418152747/https://scx1.b-cdn.net/csz/news/175u/2021/greenchemist.jpg" src="data:image/gif;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=" alt=""> </a> </figure> <div class="sorted-article-content d-flex flex-column ie-flex-1"> <h3 class="mb-1 mb-lg-2"><a class="news-link" href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-green-chemistry-biofuel-mechanism-key.html">Green chemistry and biofuel: The mechanism of a key photoenzyme decrypted</a></h3> <p class="mb-1 pr-1"> The functioning of the enzyme FAP, useful for producing biofuels and for green chemistry, has been decrypted. This result mobilized an international team of scientists, including many French researchers from the CEA, CNRS, ... </p> </div> </div> <div class="article__info mt-lg-3 mt-2"> <div class="article__info-item mr-auto"> <div class="text-low text-uppercase"> <p> Biochemistry </p> </div> </div> <div class="article__info-item mr-3"> <span class="mr-3"></span> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_clock" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"> Apr 08, 2021 </p> </div> <div class="article__info-item mr-3"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_comment" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>0</span></p> </div> <div class="article__info-item"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_share" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>58</span></p> </div> </div> </article> <article class="sorted-article"> <div class="d-flex"> <figure class="sorted-article-figure"> <a href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-weather-radar-ecological-lessen-hazards.html"> <img data-src="https://web.archive.org/web/20210418152747/https://scx1.b-cdn.net/csz/news/175u/2021/weatherradar.jpg" src="data:image/gif;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=" alt=""> </a> </figure> <div class="sorted-article-content d-flex flex-column ie-flex-1"> <h3 class="mb-1 mb-lg-2"><a class="news-link" href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-weather-radar-ecological-lessen-hazards.html">Weather radar for ecological forecasting can lessen hazards for migratory birds</a></h3> <p class="mb-1 pr-1"> Forecasts aren't just for the weather. Scientists can use weather radar and related technology to chart the journeys of billions of migratory birds, which can help protect these global travelers from a growing array of threats. </p> </div> </div> <div class="article__info mt-lg-3 mt-2"> <div class="article__info-item mr-auto"> <div class="text-low text-uppercase"> <p> Plants & Animals </p> </div> </div> <div class="article__info-item mr-3"> <span class="mr-3"></span> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_clock" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"> Apr 08, 2021 </p> </div> <div class="article__info-item mr-3"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_comment" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>0</span></p> </div> <div class="article__info-item"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_share" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>5</span></p> </div> </div> </article> <div class="sorted-article ads"> <!-- Main-native --> <script async src="//web.archive.org/web/20210418152747js_/https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script> <ins class="adsbygoogle" style="display:block" data-ad-format="fluid" data-ad-layout-key="-fz-32+4x-a4+7t" data-ad-client="ca-pub-0536483524803400" data-ad-slot="9793191136"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </div> <article class="sorted-article"> <div class="d-flex"> <figure class="sorted-article-figure"> <a href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-graphene-electrons-temperature.html"> <img data-src="https://web.archive.org/web/20210418152747/https://scx1.b-cdn.net/csz/news/175u/2016/graphene.jpg" src="data:image/gif;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=" alt=""> </a> </figure> <div class="sorted-article-content d-flex flex-column ie-flex-1"> <h3 class="mb-1 mb-lg-2"><a class="news-link" href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-graphene-electrons-temperature.html">A graphene system that freezes electrons as the temperature rises</a></h3> <p class="mb-1 pr-1"> Two teams of researchers have independently found that there exists a certain type of graphene system where electrons freeze as the temperature rises. The first team, with members from Israel, the U.S. and Japan, found that ... </p> </div> </div> <div class="article__info mt-lg-3 mt-2"> <div class="article__info-item mr-auto"> <div class="text-low text-uppercase"> <p> Nanophysics </p> </div> </div> <div class="article__info-item mr-3"> <span class="mr-3"><a href="https://web.archive.org/web/20210418152747/https://phys.org/editorials/"> <span class="ml-2 badge a_report">report</span> </a> </span> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_clock" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"> Apr 08, 2021 </p> </div> <div class="article__info-item mr-3"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_comment" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>0</span></p> </div> <div class="article__info-item"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_share" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>4363</span></p> </div> </div> </article> <article class="sorted-article"> <div class="d-flex"> <figure class="sorted-article-figure"> <a href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-greater-scrutiny-chains.html"> <img data-src="https://web.archive.org/web/20210418152747/https://scx1.b-cdn.net/csz/news/175u/2021/newmodelingp.jpg" src="data:image/gif;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=" alt=""> </a> </figure> <div class="sorted-article-content d-flex flex-column ie-flex-1"> <h3 class="mb-1 mb-lg-2"><a class="news-link" href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-greater-scrutiny-chains.html">New modeling provides greater scrutiny for supply chains</a></h3> <p class="mb-1 pr-1"> Unethical or destructive practices can be hidden within supply chains bringing us items we want and need. Dr. Arne Geschke uses data to drill into the complex global production web. </p> </div> </div> <div class="article__info mt-lg-3 mt-2"> <div class="article__info-item mr-auto"> <div class="text-low text-uppercase"> <p> Mathematics </p> </div> </div> <div class="article__info-item mr-3"> <span class="mr-3"></span> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_clock" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"> Apr 08, 2021 </p> </div> <div class="article__info-item mr-3"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_comment" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>0</span></p> </div> <div class="article__info-item"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_share" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>9</span></p> </div> </div> </article> <article class="sorted-article"> <div class="d-flex"> <figure class="sorted-article-figure"> <a href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-gut-bacteria-horse-cells-athletic.html"> <img data-src="https://web.archive.org/web/20210418152747/https://scx1.b-cdn.net/csz/news/175u/2021/gutbacteriaq.jpg" src="data:image/gif;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=" alt=""> </a> </figure> <div class="sorted-article-content d-flex flex-column ie-flex-1"> <h3 class="mb-1 mb-lg-2"><a class="news-link" href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-gut-bacteria-horse-cells-athletic.html">Gut bacteria 'talk' to horse's cells to improve their athletic performance</a></h3> <p class="mb-1 pr-1"> A horse's gut microbiome communicates with its host by sending chemical signals to its cells, which has the effect of helping the horse to extend its energy output, finds a new study published in Frontiers in Molecular Biosciences. ... </p> </div> </div> <div class="article__info mt-lg-3 mt-2"> <div class="article__info-item mr-auto"> <div class="text-low text-uppercase"> <p> Molecular & Computational biology </p> </div> </div> <div class="article__info-item mr-3"> <span class="mr-3"></span> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_clock" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"> Apr 08, 2021 </p> </div> <div class="article__info-item mr-3"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_comment" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>0</span></p> </div> <div class="article__info-item"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_share" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>16</span></p> </div> </div> </article> <article class="sorted-article"> <div class="d-flex"> <figure class="sorted-article-figure"> <a href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-membranes-batteries-drug-discovery-toolbox.html"> <img data-src="https://web.archive.org/web/20210418152747/https://scx1.b-cdn.net/csz/news/175u/2021/designingsel.jpg" src="data:image/gif;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=" alt=""> </a> </figure> <div class="sorted-article-content d-flex flex-column ie-flex-1"> <h3 class="mb-1 mb-lg-2"><a class="news-link" href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-membranes-batteries-drug-discovery-toolbox.html">Designing selective membranes for batteries using a drug discovery toolbox</a></h3> <p class="mb-1 pr-1"> Membranes that allow certain molecules to quickly pass through while blocking others are key enablers for energy technologies from batteries and fuel cells to resource refinement and water purification. For example, membranes ... </p> </div> </div> <div class="article__info mt-lg-3 mt-2"> <div class="article__info-item mr-auto"> <div class="text-low text-uppercase"> <p> Biochemistry </p> </div> </div> <div class="article__info-item mr-3"> <span class="mr-3"></span> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_clock" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"> Apr 07, 2021 </p> </div> <div class="article__info-item mr-3"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_comment" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>0</span></p> </div> <div class="article__info-item"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_share" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>1309</span></p> </div> </div> </article> <article class="sorted-article"> <div class="d-flex"> <figure class="sorted-article-figure"> <a href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-scientists-electronegativity-scale.html"> <img data-src="https://web.archive.org/web/20210418152747/https://scx1.b-cdn.net/csz/news/175u/2021/atomic.jpg" src="data:image/gif;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=" alt=""> </a> </figure> <div class="sorted-article-content d-flex flex-column ie-flex-1"> <h3 class="mb-1 mb-lg-2"><a class="news-link" href="https://web.archive.org/web/20210418152747/https://phys.org/news/2021-04-scientists-electronegativity-scale.html">Scientists create a new electronegativity scale</a></h3> <p class="mb-1 pr-1"> Skoltech chemists have proposed a new electronegativity scale and published their findings in Nature Communications. </p> </div> </div> <div class="article__info mt-lg-3 mt-2"> <div class="article__info-item mr-auto"> <div class="text-low text-uppercase"> <p> Analytical Chemistry </p> </div> </div> <div class="article__info-item mr-3"> <span class="mr-3"></span> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_clock" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"> Apr 07, 2021 </p> </div> <div class="article__info-item mr-3"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_comment" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>0</span></p> </div> <div class="article__info-item"> <svg class="article__info-icon"> <use xlink:href="https://web.archive.org/web/20210418152747im_/https://phys.b-cdn.net/tmpl/v6/img/svg/sprite.svg#icon_share" x="0" y="0"></use> </svg> <p class="text-uppercase text-low"><span>18</span></p> </div> </div> </article> </div> </div> <div class="col-12 text-center py-5"> <div class="col d-flex justify-content-center align-items-center mb-4"> <div class="pagination-view mr-4"> page <strong>1</strong> from <span>40</span> </div> <ul class="pagination"> <li class="page-item mr-2 disabled"> <a class="btn btn-lg btn-outline-secondary text-low-up disabled" tab-index="-1" href=""> « </a> </li> <li class="page-item"> <a class="page-link btn btn-lg btn-outline-secondary text-low-up" href="page2.html"> » </a> </li> </ul> </div> </div> </div> </div> <div class="col-lg-4 order-1 order-lg-2 pt-lg-3"> <div id="wikiInfo"> <h2 class="mb-2">Energy</h2> <div> <p>In physics, <b>energy</b> (from the Greek ἐνέργεια - <i>energeia</i>, "activity, operation", from ἐνεργός - <i>energos</i>, "active, working") is a scalar physical quantity that describes the amount of work that can be performed by a force, an attribute of objects and systems that is subject to a conservation law. Different forms of energy include kinetic, potential, thermal, gravitational, sound, light, elastic, and electromagnetic energy. The forms of energy are often named after a related force.</p><p>Any form of energy can be transformed into another form, but the total energy always remains the same. This principle, the conservation of energy, was first postulated in the early 19th century, and applies to any isolated system. According to Noether's theorem, the conservation of energy is a consequence of the fact that the laws of physics do not change over time.</p><p>Although the total energy of a system does not change with time, its value may depend on the frame of reference. 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