{"id":21846,"date":"2025-03-20T09:09:34","date_gmt":"2025-03-20T12:09:34","guid":{"rendered":"https:\/\/xequematenem.com.br\/blog\/?p=21846"},"modified":"2025-03-20T09:09:36","modified_gmt":"2025-03-20T12:09:36","slug":"questao-141-enem-digital-2020","status":"publish","type":"post","link":"https:\/\/xequematenem.com.br\/blog\/questao-141-enem-digital-2020\/","title":{"rendered":"Quest\u00e3o 141 &#8211; ENEM Digital 2020"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Na central nuclear de Angra dos Reis, os res\u00edduos produzidos em duas d\u00e9cadas de opera\u00e7\u00f5es somam quase 446 toneladas de combust\u00edvel usado, que permanecer\u00e1 radioativo durante milhares de anos. O Ibama condicionou o in\u00edcio da opera\u00e7\u00e3o de Angra 3, previsto para 2014, \u00e0 aprova\u00e7\u00e3o de um projeto de dep\u00f3sito definitivo. A Comiss\u00e3o Nacional de Energia Nuclear (CNEN) se comprometeu a apresentar, at\u00e9 2010, um modelo de dep\u00f3sito para armazenar o lixo radioativo por 500 anos, em vez de milhares de anos.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c9poca, 8 set. 2008 (adaptado).&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Supondo que a taxa de produ\u00e7\u00e3o de combust\u00edvel permane\u00e7a constante e que seja necess\u00e1rio certo volume V para o armazenamento das 446 toneladas j\u00e1 produzidas, qual \u00e9 o volume m\u00ednimo aproximado que um dep\u00f3sito deve ter para armazenar o lixo radioativo produzido em 500 anos?&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A) 25 V&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B) 149 V&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C) 1 340 V&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D) 11 150 V&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">E) 14 887 V<\/p>\n\n\n\n<p class=\"has-text-align-center has-large-font-size wp-block-paragraph\"><strong>Resolu\u00e7\u00e3o&nbsp;<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Segundo o enunciado&nbsp; a cada 2 d\u00e9cadas, ou seja, 20 anos, ent\u00e3o 500 anos correspondem \u00e0:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2 d\u00e9cadas&#8212;&#8212; 20 anos<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;x &#8212;&#8212;&#8211; 500 anis<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;x = 1000 \/ 20<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;x = 50 d\u00e9cadas<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Se em 2 d\u00e9cadas s\u00e3o necess\u00e1rios um volume (V) que comporte 446 toneladas, ent\u00e3o em 50 d\u00e9cadas s\u00e3o necess\u00e1rios:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2 d\u00e9cadas &nbsp; &#8212;&#8212;- v<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">50 d\u00e9cadas &#8212;&#8212; x<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2x = 50v<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;x = 50v\/2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;x = 25v<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Alternativa A<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Na central nuclear de Angra dos Reis, os res\u00edduos produzidos em duas d\u00e9cadas de opera\u00e7\u00f5es somam quase 446 toneladas de combust\u00edvel usado, que permanecer\u00e1 radioativo durante milhares de anos. O Ibama condicionou o in\u00edcio da opera\u00e7\u00e3o de Angra 3, previsto para 2014, \u00e0 aprova\u00e7\u00e3o de um projeto de dep\u00f3sito definitivo. A Comiss\u00e3o Nacional de Energia [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17,20],"tags":[],"area-do-conhecimento":[132,118],"assunto":[35],"class_list":["post-21846","post","type-post","status-publish","format-standard","hentry","category-questoes-do-enem","category-20","area-do-conhecimento-matematica","area-do-conhecimento-matematica-e-suas-tecnologias","assunto-razao-e-proporcao"],"_links":{"self":[{"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/posts\/21846","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/comments?post=21846"}],"version-history":[{"count":1,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/posts\/21846\/revisions"}],"predecessor-version":[{"id":21847,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/posts\/21846\/revisions\/21847"}],"wp:attachment":[{"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/media?parent=21846"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/categories?post=21846"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/tags?post=21846"},{"taxonomy":"area-do-conhecimento","embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/area-do-conhecimento?post=21846"},{"taxonomy":"assunto","embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/assunto?post=21846"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}