{"id":72,"date":"2014-11-16T15:05:27","date_gmt":"2014-11-16T15:05:27","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=72"},"modified":"2024-09-02T16:58:01","modified_gmt":"2024-09-02T16:58:01","slug":"exercicios-da-ufpr-2015","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/universidades-2015\/exercicios-da-ufpr-2015\/","title":{"rendered":"Exerc\u00edcios da UFPR 2015"},"content":{"rendered":"

\"\"<\/p>\n

A\u00a0Universidade Federal do Paran\u00e1\u00a0(UFPR)\u00a0\u00e9 a mais antiga\u00a0institui\u00e7\u00e3o de ensino publico federal com concep\u00e7\u00e3o de\u00a0universidade\u00a0do\u00a0Brasil\u00a0.<\/b><\/span><\/span><\/span><\/p>\n

Atualmente as instala\u00e7\u00f5es da universidade est\u00e3o distribu\u00eddas entre a sede, na cidade de\u00a0Curitiba<\/a>\u00a0e os diversos\u00a0<\/b><\/span><\/span><\/span>campi<\/b><\/i><\/span><\/span><\/span>\u00a0em outras cidades do\u00a0Paran\u00e1 \u00a0. A\u00a0UFPR\u00a0adota desde 2004 em seu\u00a0vestibular\u00a0um\u00a0sistema de cotas pr\u00f3prio que reserva 20% das vagas de cada curso para estudantes oriundos de escolas p\u00fablicas\u00a0e 20% para alunos\u00a0negros\u00a0e\u00a0pardos.\u00a0\u00a0Em 2013 passou a adotar, concomitantemente, o sistema de cotas institu\u00eddo pelo governo federal, de modo que cerca de metade das vagas atuais s\u00e3o destinadas os dois grupos j\u00e1 citados<\/b><\/span><\/span><\/span><\/p>\n

A\u00a0UFPR\u00a0\u00e9 conhecida por ter um dos mais dif\u00edceis e exigentes processos seletivos dentre as universidades federais. A 1\u00aa fase \u00e9 composta de 80 quest\u00f5es de conhecimento geral (Matem\u00e1tica,\u00a0F\u00edsica,\u00a0Qu\u00edmica,\u00a0Biologia,\u00a0Hist\u00f3ria,\u00a0Portugu\u00eas,\u00a0Geografia\u00a0e L\u00edngua Estrangeira Moderna). A 2\u00aa Fase \u00e9 dividida em duas etapas:<\/b><\/span><\/span><\/span><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>Compreens\u00e3o e Produ\u00e7\u00e3o de Textos<\/b><\/span><\/span><\/span><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>Provas Espec\u00edficas (vari\u00e1veis conforme o curso desejado)<\/b><\/span><\/span><\/span><\/p>\n

Diferentemente de v\u00e1rias institui\u00e7\u00f5es, a UFPR optou por substituir a tradicional reda\u00e7\u00e3o dissertativa-argumentativa longa (modelo ENEM,\u00a0Fuvest) por 5 propostas mais curtas por\u00e9m mais abrangentes quanto a tema, flexibilidade e conhecimento de mundo do candidato, tornando o exame mais seletivo<\/b><\/span><\/span><\/span><\/p>\n

Diversos\u00a0<\/b><\/span><\/span><\/span>campi<\/b><\/i><\/span><\/span><\/span>\u00a0da universidade:<\/b><\/span><\/span><\/span><\/p>\n

em Curitiba:<\/b><\/span><\/span><\/span><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>Campus<\/b><\/i><\/span><\/span><\/span>\u00a0I\u00a0–\u00a0Juvev\u00ea, compreende o setor de Ci\u00eancias Agr\u00e1rias e o Hospital Veterin\u00e1rio (no Cabral) e o\u00a0P\u00f3lo\u00a0da Comunica\u00e7\u00e3o (noJuvev\u00ea)<\/b><\/span><\/span><\/span><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>Campus<\/b><\/i><\/span><\/span><\/span>\u00a0II, compreende a Reitoria, o setor de Ci\u00eancias da Sa\u00fade e o Hospital de Cl\u00ednicas (no Alto da Gl\u00f3ria), o Centro de Vis\u00e3o e Departamento de Artes (no Batel)<\/b><\/span><\/span><\/span><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>Campus<\/b><\/i><\/span><\/span><\/span>\u00a0III, compreende o Jardim Bot\u00e2nico (no bairro Jardim Bot\u00e2nico), o Centro Polit\u00e9cnico e o Setor de Educa\u00e7\u00e3o Profissional e Tecnol\u00f3gica (no bairro Jardim das Am\u00e9ricas)<\/b><\/span><\/span><\/span><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>Campus<\/b><\/i><\/span><\/span><\/span>\u00a0Rebou\u00e7as (no bairro Rebou\u00e7as)<\/b><\/span><\/span><\/span><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>Hospital do Trabalhador (no bairro Port\u00e3o)<\/b><\/span><\/span><\/span><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>Maternidade Victor Ferreira do Amaral<\/a>\u00a0(no bairro \u00c1gua Verde)<\/b><\/span><\/span><\/span><\/p>\n

em outras cidades paranaenses:<\/b><\/span><\/span><\/span><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>Campus<\/b><\/i><\/span><\/span><\/span>\u00a0e Setor Palotina, em\u00a0Palotina<\/a><\/b><\/span><\/span><\/span><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>Campus<\/b><\/i><\/span><\/span><\/span>\u00a0Pontal\u00a0– Centro de Estudos do Mar, em\u00a0Pontal do Paran\u00e1<\/a><\/b><\/span><\/span><\/span><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>Campus<\/b><\/i><\/span><\/span><\/span>\u00a0e Setor Litoral, em\u00a0Matinhos<\/a><\/b><\/span><\/span><\/span><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>Campus<\/b><\/i><\/span><\/span><\/span>\u00a0Avan\u00e7ado\u00a0– Fazenda Experimental\u00a0Canguiri, em\u00a0Pinhais<\/a><\/b><\/span><\/span><\/span><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>Campus<\/b><\/i><\/span><\/span><\/span>\u00a0Avan\u00e7ado\u00a0– Fazenda Experimental Rio Negro, em\u00a0Rio Negro<\/a><\/b><\/span><\/span><\/span><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>Campus<\/b><\/i><\/span><\/span><\/span>\u00a0Avan\u00e7ado\u00a0– Fazenda Experimental S\u00e3o Jo\u00e3o do Triunfo, em\u00a0S\u00e3o Jo\u00e3o do Triunfo<\/a><\/b><\/span><\/span><\/span><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>Campus<\/b><\/i><\/span><\/span><\/span>\u00a0Avan\u00e7ado\u00a0– Fazenda Experimental Bandeirantes, em\u00a0Bandeirantes<\/a><\/b><\/span><\/span><\/span><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>Campus<\/b><\/i><\/span><\/span><\/span>\u00a0Avan\u00e7ado\u00a0– Fazenda Experimental Paranava\u00ed, em\u00a0Paranava\u00ed<\/a><\/b><\/span><\/span><\/span><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>Museu de Arqueologia e Etnologia da UFPR, em\u00a0Paranagu\u00e1<\/a><\/b><\/span><\/span><\/span><\/p>\n

O\u00a0Hospital de Cl\u00ednicas da Universidade Federal do Paran\u00e1 (ou simplesmente HC)\u00a0\u00e9 o hospital universit\u00e1rio da faculdade de medicina da UFPR. Sua sede est\u00e1 localizada na cidade de Curitiba, capital do Paran\u00e1, sendo o maior hospital do estado.<\/b><\/span><\/span><\/span><\/p>\n

.UFPR\u00a0est\u00e1 entre as\u00a0universidades brasileiras\u00a0consideradas melhores do mundo<\/b><\/span><\/span><\/span><\/p>\n

9\u00b0 colocada\u00a0no ranking no ranking universit\u00e1rio folha de S\u00e3o<\/b><\/span><\/span><\/span> Paulo<\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

01-(UFPR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Para ir a um determinado local, um motorista consultou o <\/b><\/span><\/span>aparelho de GPS (Sistema de Posicionamento Global), <\/b><\/span><\/span><\/span>o qual indicou o <\/b><\/span><\/span>caminho representado na figura a seguir.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Sabendo que o <\/b><\/span><\/span><\/span>maior segmento <\/b><\/span><\/span><\/span>a ser percorrido no trajeto sugerido pelo GPS corresponde <\/b><\/span><\/span><\/span>\u00e0 dist\u00e2ncia de 345m<\/b><\/span><\/span><\/span>, \u00e9 <\/b><\/span><\/span><\/span>correto<\/b><\/span><\/span><\/span> afirmar que a <\/b><\/span><\/span><\/span>dist\u00e2ncia total a ser percorrida \u00e9 de<\/b><\/span><\/span><\/span><\/p>\n

a)<\/b><\/span><\/span><\/span> 425m <\/b><\/span><\/span><\/span>e a escala utilizada \u00e9 de 1<\/b><\/span><\/span>:<\/b><\/span><\/span><\/span>1000. <\/b><\/span><\/span>b) <\/b><\/span><\/span><\/span>705m e a escala utilizada \u00e9 de 1:5000.<\/b><\/span><\/span><\/p>\n

c) <\/b><\/span><\/span><\/span>810m e a escala utilizada \u00e9 de 1:2500. <\/b><\/span><\/span>d) <\/b><\/span><\/span><\/span>810m e a escala utilizada \u00e9 de 1:5000.<\/b><\/span><\/span><\/p>\n

e) <\/b><\/span><\/span><\/span>1410m e a escala utilizada \u00e9 de 1:10000.<\/b><\/span><\/span><\/p>\n

02-(UFPR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Um <\/b><\/span><\/span>ve\u00edculo est\u00e1 se movendo ao longo de uma estrada plana e retil\u00edne<\/b><\/span><\/span><\/span>a. Sua <\/b><\/span><\/span>velocidade<\/b><\/span><\/span><\/span> em <\/b><\/span><\/span>fun\u00e7\u00e3o do tempo<\/b><\/span><\/span><\/span>, para um trecho do percurso, <\/b><\/span><\/span>foi registrada <\/b><\/span><\/span><\/span>e <\/b><\/span><\/span>est\u00e1 mostrada no gr\u00e1fico abaixo.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Considerando que em <\/b><\/span><\/span>t = 0 a posi\u00e7\u00e3o do ve\u00edculo s \u00e9 igual a zero<\/b><\/span><\/span><\/span>, assinale a <\/b><\/span><\/span>alternativa correta para a sua posi\u00e7\u00e3o ao final dos 45 s.<\/b><\/span><\/span><\/span><\/p>\n

a) <\/b><\/span><\/span><\/span>330 m. <\/b><\/span><\/span>b) <\/b><\/span><\/span><\/span>480 m. <\/b><\/span><\/span>c)<\/b><\/span><\/span><\/span> 600 m. <\/b><\/span><\/span>d) <\/b><\/span><\/span><\/span>715 m. <\/b><\/span><\/span>e) <\/b><\/span><\/span><\/span>804 m.<\/b><\/span><\/span><\/p>\n

03-(UFPR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Um <\/b><\/span><\/span>objeto de <\/b><\/span><\/span><\/span>massa m<\/b><\/span><\/span><\/span>est\u00e1 em <\/b><\/span><\/span>movimento circular<\/b><\/span><\/span><\/span>, deslizando sobre um<\/b><\/span><\/span>plano<\/b><\/span><\/span><\/span><\/p>\n

inclinado.<\/b><\/span><\/span><\/span> O objeto est\u00e1 preso em uma das extremidades de uma <\/b><\/span><\/span>corda de comprimento L<\/b><\/span><\/span><\/span>, cuja <\/b><\/span><\/span>massa e elasticidade s\u00e3o desprez\u00edveis<\/b><\/span><\/span><\/span>. A <\/b><\/span><\/span>outra extremidade<\/b><\/span><\/span><\/span><\/p>\n

da corda est\u00e1 <\/b><\/span><\/span><\/span>fixada <\/b><\/span><\/span><\/span>na superf\u00edcie de um plano inclinado<\/b><\/span><\/span><\/span>, conforme indicado na figura a seguir.<\/b><\/span><\/span><\/p>\n

\"\"<\/p>\n

O <\/b><\/span><\/span>plano inclinado faz um \u00e2ngulo \u03b8 = 30<\/b><\/span><\/span><\/span>o <\/b><\/span><\/span><\/sup><\/span>em rela\u00e7\u00e3o ao plano horizontal<\/b><\/span><\/span><\/span>. Considerando <\/b><\/span><\/span>g <\/b><\/span><\/span><\/span>a <\/b><\/span><\/span>acelera\u00e7\u00e3o da gravidade <\/b><\/span><\/span><\/span>e <\/b><\/span><\/span>\u03bc = 1\/\u03c0\u221a3 <\/b><\/span><\/span><\/span>o coeficiente de atrito cin\u00e9tico <\/b><\/span><\/span><\/span>entre a superf\u00edcie do plano inclinado e o objeto<\/b><\/span><\/span><\/span>, assinale a <\/b><\/span><\/span>alternativa <\/b><\/span><\/span><\/span>correta<\/b><\/span><\/span><\/span> para a <\/b><\/span><\/span><\/span>varia\u00e7\u00e3o da energia cin\u00e9tica do objeto, em m\u00f3dulo<\/b><\/span><\/span><\/span>, ao se mover do <\/b><\/span><\/span><\/span>ponto P, <\/b><\/span><\/span><\/span>cuja velocidade em <\/b><\/span><\/span><\/span>m\u00f3dulo \u00e9 V<\/b><\/span><\/span><\/span>P<\/b><\/span><\/span><\/sub><\/span>, ao <\/b><\/span><\/span><\/span>ponto Q, onde sua velocidade tem m\u00f3dulo V<\/b><\/span><\/span><\/span>Q<\/b><\/span><\/span><\/sub><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

Na resolu\u00e7\u00e3o desse problema considere<\/b><\/span><\/span><\/p>\n

sen 30<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sup><\/span> = 1\/2 cos 30<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sup><\/span> = \u221a3\/2<\/b><\/span><\/span><\/span><\/p>\n

a) <\/b><\/span><\/span><\/span>mgL. <\/b><\/span><\/span>b)<\/b><\/span><\/span><\/span>mgL\/2 <\/b><\/span><\/span>c) <\/b><\/span><\/span><\/span>2mgL\/3 <\/b><\/span><\/span>d) <\/b><\/span><\/span><\/span>3mgL\/2 <\/b><\/span><\/span>e) <\/b><\/span><\/span><\/span>2mgL<\/b><\/span><\/span><\/p>\n

04-(UFPR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Um <\/b><\/span><\/span>bloco B de <\/b><\/span><\/span><\/span>massa 400 g<\/b><\/span><\/span><\/span> est\u00e1 apoiado sobre um <\/b><\/span><\/span><\/span>bloco A de massa 800 g<\/b><\/span><\/span><\/span>, o qual<\/b><\/span><\/span><\/span> <\/b>est\u00e1 sobre uma superf\u00edcie horizontal<\/b><\/span><\/span><\/span>. Os dois blocos est\u00e3o<\/b><\/span><\/span>unidos por uma corda<\/b><\/span><\/span><\/span> <\/b>inextens\u00edvel e sem massa<\/b><\/span><\/span><\/span>, que passa por uma polia presa na parede, conforme ilustra a <\/b><\/span><\/span>figura abaixo.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

O <\/b><\/span><\/span>coeficiente de atrito cin\u00e9tico entre os dois blocos e entre o bloco A e a superf\u00edcie<\/b><\/span><\/span><\/span><\/b><\/p>\n

horizontal \u00e9 o mesmo e vale 0,35<\/b><\/span><\/span><\/span>. Considerando a <\/b><\/span><\/span>acelera\u00e7\u00e3o da gravidade igual a 10<\/b><\/span><\/span><\/span> <\/b>m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> e <\/b><\/span><\/span>desprezando a massa da polia<\/b><\/span><\/span><\/span>, assinale a <\/b><\/span><\/span>alternativa correta para o m\u00f3dulo da<\/b><\/span><\/span><\/span> <\/b>for\u00e7a \"\"<\/b><\/span><\/span><\/span> <\/b>necess\u00e1ria para que os dois blocos se movam com <\/b><\/span><\/span><\/span>velocidade constante<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

a)<\/b><\/span><\/span><\/span> 1,4 N. <\/b><\/span><\/span>b) <\/b><\/span><\/span><\/span>4,2 N. <\/b><\/span><\/span>c)<\/b><\/span><\/span><\/span> 7,0 N. <\/b><\/span><\/span>d)<\/b><\/span><\/span><\/span> 8,5 N. <\/b><\/span><\/span>e) <\/b><\/span><\/span><\/span>9,3 N.<\/b><\/span><\/span><\/p>\n

05-(UFPR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

O <\/b><\/span><\/span>estudo da calorimetria e das leis da termodin\u00e2mica nos d\u00e1 explica\u00e7\u00f5es para v\u00e1rios<\/b><\/span><\/span><\/span> <\/b>fen\u00f4menos encontrados na natureza<\/b><\/span><\/span><\/span>. Considere o <\/b><\/span><\/span>seguinte texto que apresenta a<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

explica\u00e7\u00e3o, do ponto de vista dessas \u00e1reas da F\u00edsica, para a forma\u00e7\u00e3o das nuvens:<\/b><\/span><\/span><\/span><\/p>\n

Quando uma <\/b><\/span><\/span>por\u00e7\u00e3o de ar aquecido sobe<\/b><\/span><\/span><\/span>, <\/b><\/span><\/span>contendo \u00e1gua que acabou de<\/b><\/span><\/span><\/span> __________ da superf\u00edcie, <\/b><\/span><\/span>passa a estar submetida a uma press\u00e3o cada vez<\/b><\/span><\/span><\/span> __________.<\/b><\/span><\/span><\/p>\n

A <\/b><\/span><\/span>r\u00e1pida varia\u00e7\u00e3o na press\u00e3o<\/b><\/span><\/span><\/span> provoca uma <\/b><\/span><\/span>r\u00e1pida expans\u00e3o do ar<\/b><\/span><\/span><\/span> <\/b>junto com uma<\/b><\/span><\/span><\/span> <\/b>redu\u00e7\u00e3o<\/b><\/span><\/span><\/span> de seu\/sua __________. Essa <\/b><\/span><\/span>r\u00e1pida expans\u00e3o \u00e9 considerada<\/b><\/span><\/span><\/span> __________, isto \u00e9, <\/b><\/span><\/span>sem troca de calor com sua vizinhan\u00e7a, porque ocorre muito rapidamente<\/b><\/span><\/span><\/span>. O <\/b><\/span><\/span>g\u00e1s em<\/b><\/span><\/span><\/span> <\/b>expans\u00e3o <\/b><\/span><\/span><\/span>__________<\/b><\/span><\/span>energia interna ao se expandir<\/b><\/span><\/span><\/span>, e isso acarreta seu <\/b><\/span><\/span>resfriamento <\/b><\/span><\/span><\/span>at\u00e9 atingir uma temperatura na qual a quantidade de vapor de \u00e1gua \u00e9 suficiente para saturar o ar naquele ponto e <\/b><\/span><\/span>assim formar as nuvens.<\/b><\/span><\/span><\/span><\/p>\n

Assinale a alternativa que preenche as lacunas corretamente.<\/b><\/span><\/span><\/span><\/p>\n

a)<\/b><\/span><\/span><\/span> evaporar, menor, temperatura, adiab\u00e1tica, perde.<\/b><\/span><\/span><\/p>\n

b)<\/b><\/span><\/span><\/span> condensar, menor, volume, adiab\u00e1tica, ganha.<\/b><\/span><\/span><\/p>\n

c)<\/b><\/span><\/span><\/span> evaporar, maior, temperatura, isot\u00e9rmica, ganha.<\/b><\/span><\/span><\/p>\n

d)<\/b><\/span><\/span><\/span> condensar, maior, volume, isob\u00e1rica, perde.<\/b><\/span><\/span><\/p>\n

e)<\/b><\/span><\/span><\/span> sublimar, menor, temperatura, isot\u00e9rmica, ganha.<\/b><\/span><\/span><\/p>\n

06-(UFPR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Para participar de um <\/b><\/span><\/span>importante torneio<\/b><\/span><\/span><\/span>, uma equipe de <\/b><\/span><\/span>estudantes universit\u00e1rios<\/b><\/span><\/span><\/span> desenvolveu um <\/b><\/span><\/span>ve\u00edculo a\u00e9reo n\u00e3o tripulado<\/b><\/span><\/span><\/span>. O aparelho foi<\/b><\/span><\/span>projetado de tal maneira<\/b><\/span><\/span><\/span><\/b><\/p>\n

\"\"<\/p>\n

que ele era capaz de se <\/b><\/span><\/span><\/span>desviar<\/b><\/span><\/span><\/span> de objetos <\/b><\/span><\/span><\/span>atrav\u00e9s da emiss\u00e3o e recep\u00e7\u00e3o de ondas sonoras.<\/b><\/span><\/span><\/span><\/p>\n

A <\/b><\/span><\/span>frequ\u00eancia das ondas sonoras emitidas por ele era constante e igual a 20 kHz<\/b><\/span><\/span><\/span>. Em uma das situa\u00e7\u00f5es da <\/b><\/span><\/span>prova final,<\/b><\/span><\/span><\/span> quando o aparelho movimentava-se em <\/b><\/span><\/span>linha reta<\/b><\/span><\/span><\/span> e <\/b><\/span><\/span>com velocidade constante na dire\u00e7\u00e3o de um objeto fixo<\/b><\/span><\/span><\/span>, o <\/b><\/span><\/span>receptor do ve\u00edculo<\/b><\/span><\/span><\/span> registrou o <\/b><\/span><\/span>recebimento de ondas sonoras de frequ\u00eancia de 22,5 kHz que foram<\/b><\/span><\/span><\/span> <\/b>refletidas pelo objeto<\/b><\/span><\/span><\/span>. Considerando que <\/b><\/span><\/span>nesse instante o ve\u00edculo se encontrava a 50<\/b><\/span><\/span><\/span> <\/b>m do objeto<\/b><\/span><\/span><\/span>, assinale a <\/b><\/span><\/span>alternativa correta para o intervalo de tempo de que ele<\/b><\/span><\/span><\/span> <\/b>dispunha para se desviar e n\u00e3o colidir com o objeto<\/b><\/span><\/span><\/span>. Considere a <\/b><\/span><\/span>velocidade do som no ar igual a 340 m\/s.<\/b><\/span><\/span><\/span><\/p>\n

a)<\/b><\/span><\/span><\/span> 1,0 s. <\/b><\/span><\/span>b) <\/b><\/span><\/span><\/span>1,5 s. <\/b><\/span><\/span>c)<\/b><\/span><\/span><\/span> 2,0 s. <\/b><\/span><\/span>d)<\/b><\/span><\/span><\/span> 2,5 s. <\/b><\/span><\/span>e)<\/b><\/span><\/span><\/span> 3,0 s<\/b><\/span><\/span><\/p>\n

07-(UFPR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Michael Faraday foi um cientista ingl\u00eas que viveu no s\u00e9culo XIX. <\/b><\/span><\/span>Atrav\u00e9s de suas<\/b><\/span><\/span><\/span> <\/b>descobertas foram estabelecidas as bases do eletromagnetismo<\/b><\/span><\/span><\/span>, relacionando fen\u00f4menos da <\/b><\/span><\/span>eletricidade, eletroqu\u00edmica e magnetismo.<\/b><\/span><\/span><\/span> Suas inven\u00e7\u00f5es permitiram o desenvolvimento do<\/b><\/span><\/span>gerador el\u00e9trico<\/b><\/span><\/span><\/span>, e foi gra\u00e7as a seus esfor\u00e7os que a eletricidade tornou-se uma tecnologia de uso pr\u00e1tico. <\/b><\/span><\/span>Em sua homenagem <\/b><\/span><\/span><\/span>uma <\/b><\/span><\/span><\/span>das <\/b><\/span><\/span><\/span>quatro leis do<\/b><\/span><\/span><\/span> <\/b>eletromagnetismo leva seu nome<\/b><\/span><\/span><\/span> e pode ser expressa como: <\/b><\/span><\/span><\/span>\ufffd\ufffd<\/b><\/span><\/span><\/span> =\u2206<\/b><\/span><\/span><\/span>\u2205\/<\/b><\/span><\/span><\/span>\u2206<\/b><\/span><\/span><\/span>\ufffd\ufffd<\/b><\/span><\/span><\/span> onde <\/b><\/span><\/span>\u03b5<\/b><\/span><\/span><\/span> \u00e9 a <\/b><\/span><\/span>for\u00e7a eletromotriz induzida em um circuito, <\/b><\/span><\/span><\/span>\u2205<\/b><\/span><\/span><\/span> <\/b>\u00e9 o fluxo magn\u00e9tico atrav\u00e9s desse circuito e <\/b><\/span><\/span><\/span>\u0394t<\/b><\/span><\/span><\/span> \u00e9 o tempo.<\/b><\/span><\/span><\/span><\/p>\n

Considere a <\/b><\/span><\/span>figura abaixo<\/b><\/span><\/span><\/span>, que representa um <\/b><\/span><\/span>\u00edm\u00e3 pr\u00f3ximo a um anel condutor e um<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

observador na posi\u00e7\u00e3o O<\/b><\/span><\/span><\/span>. O <\/b><\/span><\/span>\u00edm\u00e3 pode se deslocar ao longo do eixo do anel<\/b><\/span><\/span><\/span> e a <\/b><\/span><\/span>dist\u00e2ncia entre o polo norte e o centro do anel \u00e9 d.<\/b><\/span><\/span><\/span> Tendo em vista<\/b><\/span><\/span>essas informa\u00e7\u00f5es<\/b><\/span><\/span><\/span>,<\/b><\/span><\/span><\/p>\n

identifique as seguintes afirmativas como verdadeiras (V) ou falsas (F):<\/b><\/span><\/span><\/span><\/p>\n

( ) <\/b><\/span><\/span><\/span>Mantendo-se a dist\u00e2ncia d constante se observar\u00e1 o surgimento de uma corrente induzida no anel no sentido hor\u00e1rio.<\/b><\/span><\/span><\/p>\n

( )<\/b><\/span><\/span><\/span> Durante a aproxima\u00e7\u00e3o do \u00edm\u00e3 \u00e0 espira, observa-se o surgimento de uma corrente induzida no anel no sentido hor\u00e1rio.<\/b><\/span><\/span><\/p>\n

( )<\/b><\/span><\/span><\/span> Durante a afastamento do \u00edm\u00e3 \u00e0 espira, observa-se o surgimento de uma corrente induzida no anel no sentido hor\u00e1rio.<\/b><\/span><\/span><\/p>\n

( )<\/b><\/span><\/span><\/span> Girando-se o anel em torno do eixo Z, observa-se o surgimento de uma corrente el\u00e9trica induzida.<\/b><\/span><\/span><\/p>\n

a) <\/b><\/span><\/span><\/span><\/span>F \u2013 F \u2013 V \u2013 V <\/b><\/span><\/span><\/span>b) <\/b><\/span><\/span><\/span><\/span>F \u2013 V \u2013 F \u2013 V <\/b><\/span><\/span><\/span>c) <\/b><\/span><\/span><\/span><\/span>V \u2013 V \u2013 F \u2013 F <\/b><\/span><\/span><\/span>d)<\/b><\/span><\/span><\/span><\/span> V \u2013 F \u2013 V \u2013 F<\/b><\/span><\/span><\/span><\/p>\n

e)<\/b><\/span><\/span><\/span> F \u2013 F \u2013 V – F<\/b><\/span><\/span><\/p>\n

08-(UFPR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

A <\/b><\/span><\/span>fun\u00e7\u00e3o principal de geradores el\u00e9tricos \u00e9<\/b><\/span><\/span><\/span> <\/b>transformar em energia el\u00e9trica algum outro tipo de energia.<\/b><\/span><\/span><\/span><\/p>\n

No caso de <\/b><\/span><\/span>geradores elementares de corrente cont\u00ednua<\/b><\/span><\/span><\/span>, cujo <\/b><\/span><\/span>circuito equivalente<\/b><\/span><\/span><\/span> est\u00e1 mostrado abaixo, onde <\/b><\/span><\/span>r \u00e9 a resist\u00eancia interna do gerador e <\/b><\/span><\/span><\/span>\u03b5 <\/b><\/span><\/span><\/span>sua for\u00e7a eletromotriz<\/b><\/span><\/span><\/span>, o comportamento caracter\u00edstico \u00e9 descrito pela conhecida <\/b><\/span><\/span>equa\u00e7\u00e3o do gerador<\/b><\/span><\/span><\/span>, que fornece a <\/b><\/span><\/span>diferen\u00e7a de potencial<\/b><\/span><\/span><\/span>\u0394V <\/b><\/span><\/span><\/span>em seus terminais <\/b><\/span><\/span><\/span>A e B<\/b><\/span><\/span><\/span> em fun\u00e7\u00e3o da corrente <\/b><\/span><\/span><\/span>i <\/b><\/span><\/span><\/span>fornecida por ele<\/b><\/span><\/span><\/span>. Um <\/b><\/span><\/span>dado gerador tem a curva caracter\u00edstica mostrada no gr\u00e1fico abaixo.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

A partir do <\/b><\/span><\/span>circuito e do gr\u00e1fico<\/b><\/span><\/span><\/span> apresentados, assinale a <\/b><\/span><\/span>alternativa correta para a<\/b><\/span><\/span><\/span> <\/b>pot\u00eancia dissipada internamente na fonte quando esta fornece uma <\/b><\/span><\/span><\/span>corrente<\/b><\/span><\/span><\/span> <\/b>de 2,0 mA.<\/b><\/span><\/span><\/span><\/p>\n

a)<\/b><\/span><\/span><\/span><\/span> 5 mW. <\/b><\/span><\/span><\/span>b)<\/b><\/span><\/span><\/span><\/span> 8 mW. <\/b><\/span><\/span><\/span>c)<\/b><\/span><\/span><\/span><\/span> 10 mW. <\/b><\/span><\/span><\/span>d)<\/b><\/span><\/span><\/span><\/span> 20 mW. <\/b><\/span><\/span><\/span>e)<\/b><\/span><\/span><\/span> 80 mW<\/b><\/span><\/span><\/p>\n

09-(UFPR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Considere as <\/b><\/span><\/span>seguintes <\/b><\/span><\/span><\/span>afirmativas <\/b><\/span><\/span><\/span>relacionadas aos <\/b><\/span><\/span><\/span>fen\u00f4menos<\/b><\/span><\/span><\/span> que ocorrem com um <\/b><\/span><\/span><\/span>feixe luminoso ao incidir em superf\u00edcies espelhadas ou ao passar de um meio transparente para outro:<\/b><\/span><\/span><\/span><\/p>\n

1.<\/b><\/span><\/span><\/span> Quando um <\/b><\/span><\/span>feixe luminoso<\/b><\/span><\/span><\/span> <\/b>passa do <\/b><\/span><\/span><\/span>ar para a \u00e1gua<\/b><\/span><\/span><\/span>, a sua <\/b><\/span><\/span><\/span>frequ\u00eancia \u00e9 alterada.<\/b><\/span><\/span><\/span><\/p>\n

2.<\/b><\/span><\/span><\/span> Um <\/b><\/span><\/span>feixe luminoso pode sofrer uma reflex\u00e3o interna total<\/b><\/span><\/span><\/span> quando <\/b><\/span><\/span>atingir um meio<\/b><\/span><\/span><\/span> <\/b>com \u00edndice de refra\u00e7\u00e3o menor do que o \u00edndice de refra\u00e7\u00e3o do meio <\/b><\/span><\/span><\/span>em que ele est\u00e1 se propagando.<\/b><\/span><\/span><\/span><\/p>\n

3.<\/b><\/span><\/span><\/span> O <\/b><\/span><\/span>fen\u00f4meno da dispers\u00e3o<\/b><\/span><\/span><\/span> ocorre em <\/b><\/span><\/span><\/span>raz\u00e3o da independ\u00eancia<\/b><\/span><\/span><\/span> entre a velocidade da onda e sua frequ\u00eancia.<\/b><\/span><\/span><\/span><\/p>\n

4.<\/b><\/span><\/span><\/span> O <\/b><\/span><\/span>princ\u00edpio de Huygens<\/b><\/span><\/span><\/span> permite explicar os fen\u00f4menos da <\/b><\/span><\/span><\/span>reflex\u00e3o e da refra\u00e7\u00e3o das ondas luminosas.<\/b><\/span><\/span><\/span><\/p>\n

Assinale a <\/b><\/span><\/span>alternativa correta.<\/b><\/span><\/span><\/span><\/p>\n

a)<\/b><\/span><\/span><\/span> Somente a afirmativa 1 \u00e9 verdadeira.<\/b><\/span><\/span><\/p>\n

b)<\/b><\/span><\/span><\/span> Somente as afirmativas 2 e 4 s\u00e3o verdadeiras.<\/b><\/span><\/span><\/p>\n

c)<\/b><\/span><\/span><\/span> Somente as afirmativas 1 e 3 s\u00e3o verdadeiras.<\/b><\/span><\/span><\/p>\n

d)<\/b><\/span><\/span><\/span> Somente as afirmativas 1, 2 e 4 s\u00e3o verdadeiras.<\/b><\/span><\/span><\/p>\n

e)<\/b><\/span><\/span><\/span> Somente as afirmativas 2, 3 e 4 s\u00e3o verdadeiras.<\/b><\/span><\/span><\/p>\n

10-(UFPR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

No <\/b><\/span><\/span>final do s\u00e9culo XIX e in\u00edcio do s\u00e9culo XX, a <\/b><\/span><\/span><\/span>F\u00edsica se defrontou com v\u00e1rios<\/b><\/span><\/span><\/span> <\/b>problemas<\/b><\/span><\/span><\/span> que n\u00e3o podiam ser explicados com as <\/b><\/span><\/span><\/span>teorias e modelos aceitos at\u00e9 esse<\/b><\/span><\/span><\/span> <\/b>per\u00edodo<\/b><\/span><\/span><\/span>. Um desses problemas consistia em explicar corretamente o <\/b><\/span><\/span><\/span>fen\u00f4meno do<\/b><\/span><\/span><\/span> <\/b>Efeito Fotoel\u00e9trico<\/b><\/span><\/span><\/span>. Sobre <\/b><\/span><\/span>esse efeito, considere as seguintes afirmativas:<\/b><\/span><\/span><\/span><\/p>\n

1.<\/b><\/span><\/span><\/span> <\/b>Esse efeito foi observado <\/b><\/span><\/span><\/span>primeiramente por Henrich Hertz<\/b><\/span><\/span><\/span> e sua explica\u00e7\u00e3o <\/b><\/span><\/span><\/span>correta foi publicada em 1905 por Niels Bohr.<\/b><\/span><\/span><\/span><\/p>\n

2.<\/b><\/span><\/span><\/span> A <\/b><\/span><\/span>explica\u00e7\u00e3o correta desse efeito utilizou uma <\/b><\/span><\/span><\/span>ideia de Max Planck<\/b><\/span><\/span><\/span>, de que a luz incidente n\u00e3o poderia ter energia com um valor qualquer, mas sim <\/b><\/span><\/span><\/span>uma energia dada por m\u00faltiplos inteiros de uma por\u00e7\u00e3o elementar.<\/b><\/span><\/span><\/span><\/p>\n

3.<\/b><\/span><\/span><\/span> Segundo o <\/b><\/span><\/span><\/span>modelo proposto, cada f\u00f3ton,<\/b><\/span><\/span><\/span> ao colidir com um el\u00e9tron, <\/b><\/span><\/span><\/span>transfere-lhe<\/b><\/span><\/span><\/span> uma quantidade de energia proporcional a sua velocidade.<\/b><\/span><\/span><\/span><\/p>\n

Assinale a <\/b><\/span><\/span>alternativa correta.<\/b><\/span><\/span><\/span><\/p>\n

a)<\/b><\/span><\/span><\/span> Somente a afirmativa 1 \u00e9 verdadeira.<\/b><\/span><\/span><\/p>\n

b)<\/b><\/span><\/span><\/span> Somente a afirmativa 2 \u00e9 verdadeira.<\/b><\/span><\/span><\/p>\n

c)<\/b><\/span><\/span><\/span> Somente a afirmativa 3 \u00e9 verdadeira.<\/b><\/span><\/span><\/p>\n

d)<\/b><\/span><\/span><\/span> Somente as afirmativas 1 e 3 s\u00e3o verdadeiras.<\/b><\/span><\/span><\/p>\n

e)<\/b><\/span><\/span><\/span> Somente as afirmativas 2 e 3 s\u00e3o verdadeiras.<\/b><\/span><\/span><\/p>\n

 <\/p>\n

Confira a Resolu\u00e7\u00e3o Comentada<\/a><\/span><\/h3>\n","protected":false},"excerpt":{"rendered":"

A\u00a0Universidade Federal do Paran\u00e1\u00a0(UFPR)\u00a0\u00e9 a mais antiga\u00a0institui\u00e7\u00e3o de ensino publico federal com concep\u00e7\u00e3o de\u00a0universidade\u00a0do\u00a0Brasil\u00a0. Atualmente as instala\u00e7\u00f5es da universidade est\u00e3o distribu\u00eddas entre a sede, na cidade de\u00a0Curitiba\u00a0e os diversos\u00a0campi\u00a0em outras cidades do\u00a0Paran\u00e1 \u00a0. A\u00a0UFPR\u00a0adota desde 2004 em seu\u00a0vestibular\u00a0um\u00a0sistema de cotas pr\u00f3prio que reserva 20% das vagas de cada curso para estudantes oriundos de escolas p\u00fablicas\u00a0e 20% para alunos\u00a0negros\u00a0e\u00a0pardos.\u00a0\u00a0Em 2013 passou<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":5,"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-72","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/72","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=72"}],"version-history":[{"count":3,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/72\/revisions"}],"predecessor-version":[{"id":368,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/72\/revisions\/368"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/5"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=72"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}