{"id":3502,"date":"2018-01-19T02:19:26","date_gmt":"2018-01-19T02:19:26","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=3502"},"modified":"2024-07-15T02:55:09","modified_gmt":"2024-07-15T02:55:09","slug":"unesp-segunda-fase-2018","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/universidades-2018\/unesp-segunda-fase-2018\/","title":{"rendered":"UNESP Segunda fase – 2018"},"content":{"rendered":"

Conhecimentos espec\u00edficos<\/span><\/span><\/span><\/h3>\n

\"\"<\/h3>\n

Segunda fase – 2018<\/b><\/span><\/span><\/span><\/h3>\n

Universidade Estadual Paulista \u201cJ\u00falio de Mesquita Filho\u201d\u00a0(UNESP) \u00e9 uma universidade<\/a>\u00a0p\u00fablica<\/a>\u00a0brasileira<\/a>, com atua\u00e7\u00e3o no ensino, na\u00a0pesquisa<\/a>\u00a0e na extens\u00e3o de servi\u00e7os \u00e0 comunidade. A institui\u00e7\u00e3o \u00e9 uma das tr\u00eas universidades mantidas pelo governo do\u00a0estado<\/a>\u00a0de\u00a0S\u00e3o Paulo<\/a>, ao lado da\u00a0Universidade de S\u00e3o Paulo<\/a>\u00a0(USP) e da\u00a0Universidade Estadual de Campinas<\/a>\u00a0(Unicamp).<\/b><\/span><\/span><\/span><\/p>\n

A UNESP distingue-se das outras universidades estaduais por sua estrutura multicampi que abrange 24\u00a0<\/b><\/span><\/span><\/span>munic\u00edpios<\/b><\/span><\/span><\/span><\/span><\/a>\u00a0do estado \u2013 21\u00a0<\/b><\/span><\/span><\/span>campi<\/b><\/i><\/span><\/span><\/span><\/a>\u00a0no\u00a0interior<\/a>, um campus na cidade de\u00a0S\u00e3o Paulo<\/a>, um campus em\u00a0S\u00e3o Vicente<\/a>\u00a0e um campus em\u00a0Registro<\/a>(estes 2 \u00faltimos campi tendo sido os primeiros de uma universidade p\u00fablica no\u00a0litoral paulista<\/a>).1<\/a><\/b><\/span><\/span><\/span><\/p>\n

Unesp foi a segunda colocada entre as universidades p\u00fablicas no \u201cVIII Pr\u00eamio Melhores Universidades\u201d, presenteado anualmente pela publica\u00e7\u00e3o\u00a0<\/b><\/span><\/span><\/span>Guia do Estudante<\/b><\/i><\/span><\/span><\/span><\/a>, da\u00a0Editora Abril<\/a>.\u00a0\u00a0A\u00a0Classifica\u00e7\u00e3o Acad\u00eamica das Universidades Mundiais<\/a>(ARWU \u2013 sigla em ingl\u00eas classificou a universidade entre as posi\u00e7\u00f5es 301\u00aa- 400\u00aa no mundo e entre as cinco melhores institui\u00e7\u00f5es de ensino superior do Brasil.<\/b><\/span><\/span><\/span><\/p>\n

01- (UNESP \u2013 SP \u2013 018)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Uma <\/b><\/span><\/span><\/span>esfera de massa 50 g<\/b><\/span><\/span><\/span> est\u00e1 <\/b><\/span><\/span><\/span>totalmente submersa na \u00e1gua <\/b><\/span><\/span><\/span>contida em <\/b><\/span><\/span><\/span>um tanque <\/b><\/span><\/span><\/span>e <\/b><\/span><\/span><\/span>presa ao fundo <\/b><\/span><\/span><\/span>por <\/b><\/span><\/span><\/span>um fio, como mostra a figura 1. <\/b><\/span><\/span><\/span><\/p>\n

Em <\/b><\/span><\/span><\/span>dado instante, o fio se rompe <\/b><\/span><\/span><\/span>e a <\/b><\/span><\/span><\/span>esfera move-se, a partir do repouso, <\/b><\/span><\/span><\/span>para a <\/b><\/span><\/span><\/span>superf\u00edcie da \u00e1gua<\/b><\/span><\/span><\/span>, onde <\/b><\/span><\/span><\/span>chega 0,60 s ap\u00f3s o rompimento do fio,<\/b><\/span><\/span><\/span> como mostra a <\/b><\/span><\/span><\/span>figura 2. <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

a) Considerando <\/b><\/span><\/span><\/span>que, <\/b><\/span><\/span><\/span>enquanto a esfera est\u00e1 se movendo no interior da \u00e1gua, <\/b><\/span><\/span><\/span>a <\/b><\/span><\/span><\/span>for\u00e7a resultante sobre ela \u00e9 constante, tem intensidade 0,30 N, dire\u00e7\u00e3o vertical e sentido para cima, calcule,<\/b><\/span><\/span><\/span> em <\/b><\/span><\/span><\/span>m\/s, <\/b><\/span><\/span><\/span>a <\/b><\/span><\/span><\/span>velocidade<\/b><\/span><\/span><\/span> com que a <\/b><\/span><\/span><\/span>esfera chega \u00e0 superf\u00edcie da \u00e1gua. <\/b><\/span><\/span><\/span><\/p>\n

b) Considerando que apenas as for\u00e7as peso e empuxo atuam sobre a esfera <\/b><\/span><\/span><\/span>quando <\/b><\/span><\/span><\/span>submersa, <\/b><\/span><\/span><\/span>que a <\/b><\/span><\/span><\/span>acelera\u00e7\u00e3o gravitacional <\/b><\/span><\/span><\/span>seja <\/b><\/span><\/span><\/span>10 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> <\/b>e que a <\/b><\/span><\/span><\/span>massa espec\u00edfica da \u00e1gua seja 1,0.10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> kg\/m<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> <\/b>, <\/b><\/span><\/span><\/span>calcule<\/b><\/span><\/span><\/span> a <\/b><\/span><\/span><\/span>densidade<\/b><\/span><\/span><\/span> da esfera, <\/b><\/span><\/span><\/span>em kg\/m<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> .<\/b><\/span><\/span><\/span><\/p>\n

02- (UNESP \u2013 SP \u2013 018)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

A <\/b><\/span><\/span><\/span>figura mostra uma m\u00e1quina t\u00e9rmica <\/b><\/span><\/span><\/span>em que a <\/b><\/span><\/span><\/span>caldeira funciona como a fonte quente <\/b><\/span><\/span><\/span>e o <\/b><\/span><\/span><\/span>condensador como a fonte fria.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

a) <\/b><\/span><\/span><\/span>Considerando que, a <\/b><\/span><\/span><\/span>cada minuto, a caldeira fornece, <\/b><\/span><\/span><\/span>por <\/b><\/span><\/span><\/span>meio do vapor, <\/b><\/span><\/span><\/span>uma <\/b><\/span><\/span><\/span>quantidade de calor <\/b><\/span><\/span><\/span>igual a <\/b><\/span><\/span><\/span>1,6.10<\/b><\/span><\/span><\/span>9<\/b><\/span><\/span><\/sup><\/span> J <\/b><\/span><\/span><\/span>e que o <\/b><\/span><\/span><\/span>condensador recebe uma quantidade de calor igual a 1,2.10<\/b><\/span><\/span><\/span>9<\/b><\/span><\/span><\/sup><\/span> J, calcule<\/b><\/span><\/span><\/span> o <\/b><\/span><\/span><\/span>rendimento dessa m\u00e1quina t\u00e9rmica. <\/b><\/span><\/span><\/span><\/p>\n

b) <\/b><\/span><\/span><\/span>Considerando que <\/b><\/span><\/span><\/span>6,0 \u00d7 10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> kg de \u00e1gua de refrigera\u00e7\u00e3o fluem <\/b><\/span><\/span><\/span>pelo <\/b><\/span><\/span><\/span>condensador a cada minuto, <\/b><\/span><\/span><\/span>que <\/b><\/span><\/span><\/span>essa \u00e1gua sai do condensador <\/b><\/span><\/span><\/span>com <\/b><\/span><\/span><\/span>temperatura 20 \u00baC acima da temperatura de entrada <\/b><\/span><\/span><\/span>e que o <\/b><\/span><\/span><\/span>calor espec\u00edfico da \u00e1gua \u00e9 igual a 4,0.10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> J\/(kg<\/b><\/span><\/span><\/span>\u22c5<\/b><\/span><\/span><\/span>\u00baC), calcule <\/b><\/span><\/span><\/span>a <\/b><\/span><\/span><\/span>raz\u00e3o entre a quantidade de calor retirada pela \u00e1gua de refrigera\u00e7\u00e3o <\/b><\/span><\/span><\/span>e a <\/b><\/span><\/span><\/span>quantidade de calor recebida pelo condensador.<\/b><\/span><\/span><\/span><\/p>\n

03- (UNESP \u2013 SP \u2013 018)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Em <\/b><\/span><\/span><\/span>uma sala est\u00e3o ligados<\/b><\/span><\/span><\/span> um <\/b><\/span><\/span><\/span>aparelho de ar-condicionado, <\/b><\/span><\/span><\/span>um <\/b><\/span><\/span><\/span>televisor <\/b><\/span><\/span><\/span>e <\/b><\/span><\/span><\/span>duas l\u00e2mpadas id\u00eanticas, <\/b><\/span><\/span><\/span>como mostra a <\/b><\/span><\/span><\/span>figura.<\/b><\/span><\/span><\/span><\/p>\n

\"UNESP\"<\/p>\n

A <\/b><\/span><\/span><\/span>tabela acima informa<\/b><\/span><\/span><\/span> a <\/b><\/span><\/span><\/span>pot\u00eancia e a diferen\u00e7a de potencial <\/b><\/span><\/span><\/span>de funcionamento <\/b><\/span><\/span><\/span>desses dispositivos. <\/b><\/span><\/span><\/span><\/p>\n

a) Considerando o custo de 1 kWh <\/b><\/span><\/span><\/span>igual a <\/b><\/span><\/span><\/span>R$ 0,30 <\/b><\/span><\/span><\/span>e os <\/b><\/span><\/span><\/span>dados da tabela, <\/b><\/span><\/span><\/span>calcule, em <\/b><\/span><\/span><\/span>reais,<\/b><\/span><\/span><\/span> o <\/b><\/span><\/span><\/span>custo total da energia el\u00e9trica <\/b><\/span><\/span><\/span>consumida pelos <\/b><\/span><\/span><\/span>quatro dispositivos em um per\u00edodo de 5,0 horas. <\/b><\/span><\/span><\/span><\/p>\n

b) Considerando <\/b><\/span><\/span><\/span>que os <\/b><\/span><\/span><\/span>dispositivos <\/b><\/span><\/span><\/span>estejam <\/b><\/span><\/span><\/span>associados em paralelo <\/b><\/span><\/span><\/span>e <\/b><\/span><\/span><\/span>funcionando <\/b><\/span><\/span><\/span>conforme as <\/b><\/span><\/span><\/span>especifica\u00e7\u00f5es da tabela, calcule a intensidade da corrente el\u00e9trica total <\/b><\/span><\/span><\/span>para esse conjunto<\/b><\/span><\/span><\/span>, em amp\u00e8res.<\/b><\/span><\/span><\/span><\/p>\n

 <\/p>\n

Confira a resolu\u00e7\u00e3o comentada<\/span><\/a><\/h3>\n

 <\/p>\n

Clique aqui para ver sobre o tema!<\/a><\/p>\n

Confira as v\u00eddeo aulas!<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Conhecimentos espec\u00edficos Segunda fase – 2018 Universidade Estadual Paulista \u201cJ\u00falio de Mesquita Filho\u201d\u00a0(UNESP) \u00e9 uma universidade\u00a0p\u00fablica\u00a0brasileira, com atua\u00e7\u00e3o no ensino, na\u00a0pesquisa\u00a0e na extens\u00e3o de servi\u00e7os \u00e0 comunidade. A institui\u00e7\u00e3o \u00e9 uma das tr\u00eas universidades mantidas pelo governo do\u00a0estado\u00a0de\u00a0S\u00e3o Paulo, ao lado da\u00a0Universidade de S\u00e3o Paulo\u00a0(USP) e da\u00a0Universidade Estadual de Campinas\u00a0(Unicamp). A UNESP distingue-se das outras universidades estaduais por sua estrutura<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3353,"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-3502","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3502","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=3502"}],"version-history":[{"count":4,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3502\/revisions"}],"predecessor-version":[{"id":10376,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3502\/revisions\/10376"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3353"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=3502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}