{"id":1067,"date":"2015-07-19T03:52:45","date_gmt":"2015-07-19T03:52:45","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=1067"},"modified":"2024-09-03T12:56:45","modified_gmt":"2024-09-03T12:56:45","slug":"resolucoes-do-vestibular-da-unemat-2015","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/universidades-2015\/exercicios-resolvidos-da-unemat-2015\/resolucoes-do-vestibular-da-unemat-2015\/","title":{"rendered":"RESOLU\u00c7\u00d5ES DO VESTIBULAR DA UNEMAT-2015"},"content":{"rendered":"

RESOLU\u00c7\u00d5ES DO VESTIBULAR DA UNEMAT-2015<\/b><\/span><\/span><\/span><\/p>\n

01- <\/b><\/span><\/span><\/span>(A) Falsa<\/b><\/span><\/span><\/span> \"\" O <\/b><\/span><\/span>campo gravitacional<\/b><\/span><\/span><\/span> terrestre <\/b><\/span><\/span>diminui com a altitude<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/p>\n

(B) Falsa<\/b><\/span><\/span><\/span> \"\" como o <\/b><\/span><\/span>v\u00e1cuo \u00e9 a aus\u00eancia de mat\u00e9ria<\/b><\/span><\/span><\/span>, em toda a extens\u00e3o do mesmo a <\/b><\/span><\/span>press\u00e3o \u00e9 nula.<\/b><\/span><\/span><\/span><\/p>\n

(<\/span><\/span><\/span>C) Correta \"\" <\/b><\/span><\/span><\/span>N\u00e3o existe gravidade zero <\/b><\/span><\/span><\/span>devido \u00e0 atra\u00e7\u00e3o entre os planetas com seus campos gravitacionais interagindo e <\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>imponderabilidade\u00a0<\/b><\/span><\/span><\/span>\u00e9 a sensa\u00e7\u00e3o de aus\u00eancia de peso<\/b><\/span><\/span><\/span>. Um astronauta dentro da nave espacial e a pr\u00f3pria nave tem a mesma velocidade orbital\u00a0 V\u00a0 e a mesma <\/b><\/span><\/span><\/span>acelera\u00e7\u00e3o de queda g<\/b><\/span><\/span><\/span> (queda livre), pois as \u00f3rbitas s\u00e3o de mesmo raio. Assim, astronauta, nave, e tudo mais no ve\u00edculo ficam em <\/b><\/span><\/span><\/span>repouso uns em rela\u00e7\u00e3o aos outros, flutuando<\/b><\/span><\/span><\/span>, e o astronauta tem a sensa\u00e7\u00e3o de aus\u00eancia de peso.<\/b><\/span><\/span><\/span><\/p>\n

(D) Falsa \"\" <\/b><\/span><\/span><\/span>quando a espa\u00e7onave <\/b><\/span><\/span>entra na atmosfera<\/b><\/span><\/span><\/span>, apesar de desacelerar, o <\/b><\/span><\/span>atrito de suas<\/b><\/span><\/span><\/span> <\/b>paredes externas com o ar torna-a muito aquecida<\/b><\/span><\/span><\/span>, e a temperatura externa da espa\u00e7onave fica muito elevada.<\/b><\/span><\/span><\/p>\n

(E)<\/b><\/span><\/span><\/span> <\/b>Falsa<\/b><\/span><\/span><\/span> \"\" <\/b><\/span><\/span>Existe ar at\u00e9 a exosfera<\/b><\/span><\/span><\/span>, que \u00e9 a camada que antecede o espa\u00e7o sideral.<\/b><\/span><\/span><\/span><\/p>\n

R- C<\/span><\/span><\/span><\/p>\n

02-<\/b><\/span><\/span><\/span> Suponha que uma pessoa, na <\/b><\/span><\/span>\u00e9poca da seca<\/b><\/span><\/span><\/span>, aproxime sua m\u00e3o de um carro cuja carroceria apresente certa <\/b><\/span><\/span>diferen\u00e7a de potencial<\/b><\/span><\/span><\/span> com rela\u00e7\u00e3o ao solo, que surge <\/b><\/span><\/span>devido ao atrito com o ar<\/b><\/span><\/span><\/span> gerando cargas eletrost\u00e1ticas no mesmo. No instante em que a m\u00e3o estiver suficientemente pr\u00f3xima ou encostando no carro, fluir\u00e1 uma <\/b><\/span><\/span>corrente<\/b><\/span><\/span><\/span> que passar\u00e1 pelo ar, <\/b><\/span><\/span>pelo corpo da pessoa e, atrav\u00e9s do seu p\u00e9, atingir\u00e1 o solo.<\/b><\/span><\/span><\/span><\/p>\n

R- B<\/b><\/span><\/span><\/span><\/p>\n

03-<\/b><\/span><\/span><\/span> A Tens\u00e3o superficial<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>\u00e9 um efeito<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>f\u00edsico<\/b><\/span><\/span><\/span><\/a>\u00a0<\/b><\/span><\/span><\/span>que ocorre na<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>interface<\/b><\/span><\/span><\/span><\/a>\u00a0<\/b><\/span><\/span><\/span>entre duas<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>fases qu\u00edmicas<\/b><\/span><\/span><\/span><\/a>. Ela faz com que a camada<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>superficial<\/b><\/span><\/span><\/span><\/a>\u00a0<\/b><\/span><\/span><\/span>de um<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>l\u00edquido<\/b><\/span><\/span><\/span><\/a>\u00a0<\/b><\/span><\/span><\/span>venha a se comportar como uma membrana el\u00e1stica. Esta propriedade \u00e9 causada pelas<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>for\u00e7as<\/b><\/span><\/span><\/span><\/a>\u00a0<\/b><\/span><\/span><\/span>de<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>coes\u00e3o<\/b><\/span><\/span><\/span><\/a>\u00a0<\/b><\/span><\/span><\/span>entre<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>mol\u00e9culas<\/b><\/span><\/span><\/span><\/a>\u00a0<\/b><\/span><\/span><\/span>semelhantes, cuja<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>resultante vetorial<\/b><\/span><\/span><\/span><\/a>\u00a0<\/b><\/span><\/span><\/span>\u00e9 diferente na interface. Enquanto as mol\u00e9culas situadas no interior de um l\u00edquido s\u00e3o atra\u00eddas em todas as dire\u00e7\u00f5es pelas mol\u00e9culas vizinhas, as mol\u00e9culas da superf\u00edcie do l\u00edquido sofrem apenas atra\u00e7\u00f5es laterais e internas. Este desbalan\u00e7o de for\u00e7as de atra\u00e7\u00e3o que faz a interface se comportar como uma pel\u00edcula el\u00e1stica como um l\u00e1tex.<\/b><\/span><\/span><\/p>\n

Por causa da tens\u00e3o superficial, alguns objetos mais densos que o l\u00edquido podem flutuar na superf\u00edcie, caso estes se mantenham secos sobre a interface. Este efeito permite, por exemplo, que<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>alguns insetos<\/b><\/span><\/span><\/span><\/a>\u00a0<\/b><\/span><\/span><\/span>caminhem sobre a superf\u00edcie da \u00e1gua e que<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>poeira<\/b><\/span><\/span><\/span><\/a>\u00a0<\/b><\/span><\/span><\/span>fina n\u00e3o afunde. A tens\u00e3o superficial tamb\u00e9m \u00e9 respons\u00e1vel pelo efeito de<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>capilaridade<\/b><\/span><\/span><\/span><\/a>, forma\u00e7\u00e3o de<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>gotas<\/b><\/span><\/span><\/span><\/a>\u00a0<\/b><\/span><\/span><\/span>e<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>bolhas<\/b><\/span><\/span><\/span><\/a>, e imiscibilidade entre<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>l\u00edquidos polares e apolares<\/b><\/span><\/span><\/span><\/a>\u00a0<\/b><\/span><\/span><\/span>(separa\u00e7\u00e3o de \u00f3leo e \u00e1gua).<\/b><\/span><\/span><\/p>\n

R- C<\/b><\/span><\/span><\/span><\/p>\n

 <\/p>\n

Voltar para os Exerc\u00edcios<\/span><\/a><\/h3>\n","protected":false},"excerpt":{"rendered":"

RESOLU\u00c7\u00d5ES DO VESTIBULAR DA UNEMAT-2015 01- (A) Falsa O campo gravitacional terrestre diminui com a altitude. (B) Falsa como o v\u00e1cuo \u00e9 a aus\u00eancia de mat\u00e9ria, em toda a extens\u00e3o do mesmo a press\u00e3o \u00e9 nula. (C) Correta N\u00e3o existe gravidade zero devido \u00e0 atra\u00e7\u00e3o entre os planetas com seus campos gravitacionais interagindo e \u00a0imponderabilidade\u00a0\u00e9 a sensa\u00e7\u00e3o de aus\u00eancia de<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1065,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-1067","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/1067","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/comments?post=1067"}],"version-history":[{"count":2,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/1067\/revisions"}],"predecessor-version":[{"id":1069,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/1067\/revisions\/1069"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/1065"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=1067"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}