{"id":16996,"date":"2024-09-21T16:48:52","date_gmt":"2024-09-21T19:48:52","guid":{"rendered":"https:\/\/xequematenem.com.br\/blog\/?p=16996"},"modified":"2024-09-21T16:55:17","modified_gmt":"2024-09-21T19:55:17","slug":"questao-47-enem-2016","status":"publish","type":"post","link":"https:\/\/xequematenem.com.br\/blog\/questao-47-enem-2016\/","title":{"rendered":"Quest\u00e3o 047 &#8211; ENEM 2016"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">A usina de Itaipu \u00e9 uma das maiores hidrel\u00e9tricas do mundo em gera\u00e7\u00e3o de energia. Com 20 unidades geradoras e 14 000 MW de pot\u00eancia total instalada, apresenta uma queda de 118,4 m e vaz\u00e3o nominal de 690 m<sup>3<\/sup> \/s por unidade geradora. O c\u00e1lculo da pot\u00eancia te\u00f3rica leva em conta a altura da massa de \u00e1gua represada pela barragem, a gravidade local (10 m\/s<sup>2<\/sup> ) e a densidade da \u00e1gua (1 000 kg\/m\u00b3 ). A diferen\u00e7a entre a pot\u00eancia te\u00f3rica e a instalada \u00e9 a pot\u00eancia n\u00e3o aproveitada.&nbsp;<\/p>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\"><strong>Dispon\u00edvel em: www.itaipu.gov.br. Acesso em: 11 maio 2013 (adaptado).\u00a0<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Qual \u00e9 a pot\u00eancia, em MW, n\u00e3o aproveitada em cada unidade geradora de Itaipu?&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A) 0&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B) 1,18&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C) 116,96&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D) 816,96&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">E) 13 183,04<\/p>\n\n\n\n<p class=\"has-text-align-center has-large-font-size wp-block-paragraph\"><strong>Solu\u00e7\u00e3o<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A pot\u00eancia dissipada \u00e9 descrita por<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"200\" height=\"38\" data-src=\"https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-670.png\" alt=\"\" class=\"wp-image-16997 lazyload\" title=\"\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 200px; --smush-placeholder-aspect-ratio: 200\/38;\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">E a pot\u00eancia \u00e9 calculada como<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"80\" height=\"51\" data-src=\"https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-671.png\" alt=\"\" class=\"wp-image-16998 lazyload\" title=\"\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 80px; --smush-placeholder-aspect-ratio: 80\/51;\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Nesse caso, a energia que a pot\u00eancia descreve \u00e9 a energia potencial gravitacional, dada por<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"107\" height=\"45\" data-src=\"https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-675.png\" alt=\"\" class=\"wp-image-17002 lazyload\" title=\"\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 107px; --smush-placeholder-aspect-ratio: 107\/45;\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Sendo m sua massa, g \u00e9 a gravidade e h a altura. Al\u00e9m disso, podemos escrever a massa em fun\u00e7\u00e3o de seu volume e densidade m = \u03c1 \u00d7 V\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Assim,&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"126\" height=\"59\" data-src=\"https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-674.png\" alt=\"\" class=\"wp-image-17001 lazyload\" title=\"\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 126px; --smush-placeholder-aspect-ratio: 126\/59;\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A vaz\u00e3o Z \u00e9 dada por&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"60\" height=\"38\" data-src=\"https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-673.png\" alt=\"\" class=\"wp-image-17000 lazyload\" title=\"\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 60px; --smush-placeholder-aspect-ratio: 60\/38;\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;logo<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"392\" height=\"247\" data-src=\"https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-676.png\" alt=\"\" class=\"wp-image-17003 lazyload\" title=\"\" data-srcset=\"https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-676.png 392w, https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-676-300x189.png 300w\" data-sizes=\"(max-width: 392px) 100vw, 392px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 392px; --smush-placeholder-aspect-ratio: 392\/247;\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Alternativa C<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A usina de Itaipu \u00e9 uma das maiores hidrel\u00e9tricas do mundo em gera\u00e7\u00e3o de energia. Com 20 unidades geradoras e 14 000 MW de pot\u00eancia total instalada, apresenta uma queda de 118,4 m e vaz\u00e3o nominal de 690 m3 \/s por unidade geradora. O c\u00e1lculo da pot\u00eancia te\u00f3rica leva em conta a altura da massa [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,17],"tags":[],"area-do-conhecimento":[116,121],"assunto":[],"class_list":["post-16996","post","type-post","status-publish","format-standard","hentry","category-23","category-questoes-do-enem","area-do-conhecimento-ciencias-da-natureza-e-suas-tecnologias","area-do-conhecimento-fisica"],"_links":{"self":[{"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/posts\/16996","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=16996"}],"version-history":[{"count":1,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/posts\/16996\/revisions"}],"predecessor-version":[{"id":17004,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/posts\/16996\/revisions\/17004"}],"wp:attachment":[{"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/media?parent=16996"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/categories?post=16996"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/tags?post=16996"},{"taxonomy":"area-do-conhecimento","embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/area-do-conhecimento?post=16996"},{"taxonomy":"assunto","embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/assunto?post=16996"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}