Vísindavefurinn: Stefán Ingi Valdimarsson

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16:00</strong> <span>í Reykjavík</span> </div> <div class="data-item"> <img src="/design/i_vv/icon-moon.svg" alt="Tunglið"> Tunglið <strong>Rís 02:35 • Sest 15:10</strong> <span>í Reykjavík</span> </div> <div class="data-item"> <img src="/design/i_vv/icon-flood.svg" alt="Flóð"> Flóð <strong>Árdegis: 02:21 • Síðdegis: 14:37</strong> <span>í Reykjavík</span> </div> <div class="data-item"> <img src="/design/i_vv/icon-tide.svg" alt="Fjaran"> Fjara <strong>Árdegis: 08:31 • Síðdegis: 21:03</strong> <span>í Reykjavík</span> </div> </div> </header> <div class="poppin md-send"> <a class="instructions" href="#">Leiðbeiningar<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-help-circle"><circle cx="12" cy="12" r="10"></circle><path d="M9.09 9a3 3 0 0 1 5.83 1c0 2-3 3-3 3"></path><line x1="12" y1="17" x2="12.01" y2="17"></line></svg></a><a class="instructions-close" href="#">Til baka <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-arrow-left"><line x1="19" y1="12" x2="5" y2="12"></line><polyline points="12 19 5 12 12 5"></polyline></svg></a> <h2>Sendu inn spurningu </h2> <div class="instructions-more"> <p class="first">Hér getur þú sent okkur nýjar spurningar um vísindaleg efni.</p> <p>Hafðu spurninguna stutta og hnitmiðaða og sendu aðeins eina í einu. Einlægar og vandaðar spurningar um mikilvæg efni eru líklegastar til að kalla fram vönduð og greið svör. Ekki er víst að tími vinnist til að svara öllum spurningum.</p> <p>Persónulegar upplýsingar um spyrjendur eru eingöngu notaðar í starfsemi vefsins, til dæmis til að svör verði við hæfi spyrjenda. Spurningum er ekki sinnt ef spyrjandi villir á sér heimildir eða segir ekki nægileg deili á sér.</p> <p>Spurningum sem eru ekki á verksviði vefsins er eytt.</p> <p>Að öðru leyti er hægt að spyrja Vísindavefinn um allt milli himins og jarðar!</p> <div class="content-left-sep"></div> </div> <form action="/hvers_vegna.php?id=" method="POST" name="question_send"> <div class="md-fields"> <input type="hidden" name="step" value="4"> <div class="md-input"> <label for="s-fname">Nafn</label> <input type="text" name="f_name" class="send-input" id="s-fname" required="required" value=""> <input type="hidden" name="l_name" class="send-input" id="s-sname" value=""> </div> <div class="md-input"> <label for="s-email">Netfang</label> <input type="email" name="email" class="send-input" id="s-email" required="required" value=""> </div> <div class="md-input"> <label for="s-byear">Fæðingarár</label> <input type="number" name="birthyear" class="send-input" id="s-byear" maxlength="4" required="required" value=""> </div> <div class="md-input"> <label for="s-math">Ruslpóstvörn</label> <input type="hidden" name="vv_math_problem_hash_id" class="vv_math_problem_hash_id" id="vv_math_problem_hash_id" value=""> <input type="text" name="vv_math_problem_answer" id="vv_math_problem_answer" class="send-input" valuesize="2" maxlength="2" required="required" style="width: 30%;"> <span class="s-math-container"> = <span class="math_problem_num1_txt"></span> <img class="math_problem_math_icon" src="" /> <span class="math_problem_num2_txt"></span> </span> </div> <div class="md-input"> <label for="s-question">Spurning</label> <textarea type="text" name="question" class="send-input i-question" id="s-question" rows="6" required="required"></textarea> </div> </div> <div class="md-actions"> <button type="button" value="" class="btn btn-white"><i data-feather="x"></i> Hætta við</button> <button type="submit" value="Senda" class="btn send-button"><i data-feather="check"></i> Senda</button> </div> </form> </div> <section class="layout"> <div class="main-content"> <div class="backdrop-blue"> <div class="author-title article-header layout-item"> <div class="breadcrumbs-button"> <img class="br-arrow" src="/design/i_vv/icon-arrow-left.svg"> <img class="br-home" src="/design/i_vv/icon-home.svg"> <a class="br-back" href="/">Forsíða</a> <span>Stefán Ingi Valdimarsson</span> </div> <div class="headline-elements"> <h1 class="page-title">Stefán Ingi Valdimarsson</h1> <p> sérfræðingur á Stærðfræðistofu Raunvísindastofnunar Háskóla Íslands <noscript> <a href="/author.php?id=303&page=_all">Öll svör höfundar <i data-feather="arrow-right"></i></a> </noscript> </p> </div> </div> </div> <div class="category-page layout-item"> <div class="pagination author-page"> <h3>Alls 60 svör á Vísindavefnum</h3> </div> <div class="recent-answers"> <div class="recent-answers-wrapper"> <article class="recent-article"> <a href="/svar.php?id=61529" class="recent-article-wrapper"> <div class="recent-category" style="border-color: #EB7125" > Stærðfræði </div> <h4>Hver er Terence Tao og hvert er hans framlag til stærðfræðinnar?</h4> </a> </article> <article class="recent-article"> <a href="/svar.php?id=57785" class="recent-article-wrapper"> <div class="recent-category" style="border-color: #719500" > Stjórnmálafræði </div> <h4>Hvernig verður kosið til stjórnlagaþings og er hægt að svindla?</h4> </a> </article> <article class="recent-article"> <a href="/svar.php?id=1610" class="recent-article-wrapper"> <div class="recent-category" style="border-color: #EB7125" > Eðlisfræði: í daglegu lífi </div> <h4>Hvað eru margar sekúndur í einum sólarhring og í einu ári? 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