{"id":206,"date":"2014-11-24T12:34:57","date_gmt":"2014-11-24T12:34:57","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=206"},"modified":"2024-09-02T17:02:49","modified_gmt":"2024-09-02T17:02:49","slug":"exercicios-da-unitau-2015","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/universidades-2015\/exercicios-da-unitau-2015\/","title":{"rendered":"Exerc\u00edcios da UNITAU 2015"},"content":{"rendered":"

\"\"<\/p>\n

Universidade de Taubat\u00e9<\/b><\/span><\/span><\/span>\u00a0(<\/b><\/span><\/span><\/span>Unitau<\/b><\/span><\/span><\/span>)<\/b><\/span><\/span><\/span> \u00e9 uma\u00a0autarquia<\/a>\u00a0educacional\u00a0brasileira<\/a>\u00a0pertencente ao <\/b><\/span><\/span>governo municipal de\u00a0<\/b><\/span><\/span><\/span>Taubat\u00e9<\/b><\/span><\/span><\/a>(SP), <\/b><\/span><\/span><\/span>com diversas unidades espalhadas pelo\u00a0munic\u00edpio<\/a>\u00a0contando bem como com\u00a0<\/b><\/span><\/span>campi<\/b><\/i><\/span><\/span><\/a>\u00a0nos munic\u00edpios de\u00a0<\/b><\/span><\/span>Ubatuba<\/a>,\u00a0S\u00e3o Jos\u00e9 dos Campos<\/a>,\u00a0Mogi Gua\u00e7u<\/a>\u00a0(<\/b><\/span><\/span><\/span>S\u00e3o Paulo<\/b><\/i><\/span><\/span><\/span><\/a>) e Bel\u00e9m (Par\u00e1).<\/b><\/span><\/span><\/span><\/p>\n

Formou, ao todo, mais de 90 mil\u00a0alunos<\/a>, sendo a <\/b><\/span><\/span>maior universidade do cone leste paulista <\/b><\/span><\/span><\/span>e uma das mais tradicionais do\u00a0interior de S\u00e3o Paulo<\/a>.<\/b><\/span><\/span><\/p>\n

\u00c9 a <\/b><\/span><\/span>primeira e maior universidade p\u00fablica de car\u00e1ter municipal <\/b><\/span><\/span><\/span>da\u00a0Am\u00e9rica Latina<\/a>\u00a0e, recentemente, foi eleita a <\/b><\/span><\/span>9\u00aa melhor universidade do Estado de S\u00e3o Paulo<\/b><\/span><\/span><\/span>, ocupando tamb\u00e9m a posi\u00e7\u00e3o de <\/b><\/span><\/span>40\u00aa melhor <\/b><\/span><\/span><\/span>institui\u00e7\u00e3o de ensino superior do pa\u00eds\u00a0e figurando entre as <\/b><\/span><\/span>75 melhores da Am\u00e9rica Latina.<\/b><\/span><\/span><\/span><\/p>\n

Quanto \u00e0 infra-estrutura, conta com <\/b><\/span><\/span>99\u00a0laborat\u00f3rios<\/a><\/b><\/span><\/span><\/span>, um acervo bibliogr\u00e1fico com mais do que 280 mil exemplares, mais de 50 n\u00facleos de pesquisa cadastrados no\u00a0CNPq<\/a>\u00a0nas \u00e1reas de\u00a0<\/b><\/span><\/span>Humanas<\/b><\/i><\/span><\/span>, de\u00a0<\/b><\/span><\/span>Bioci\u00eancias<\/b><\/i><\/span><\/span>\u00a0e de\u00a0<\/b><\/span><\/span>Exatas<\/b><\/i><\/span><\/span>, um\u00a0<\/b><\/span><\/span>hospital<\/a>,<\/b><\/span><\/span><\/span> uma <\/b><\/span><\/span>cl\u00ednica de psicologia, uma de fisioterapia <\/b><\/span><\/span><\/span>e uma de <\/b><\/span><\/span>odontologia.<\/b><\/span><\/span><\/span>\u00a0Al\u00e9m disso, mant\u00e9m tamb\u00e9m uma\u00a0r\u00e1dio<\/a>\u00a0e uma emissora de <\/b><\/span><\/span>televis\u00e3o universit\u00e1rias.<\/b><\/span><\/span><\/span><\/p>\n

01-(UNITAU-SP-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Um <\/b><\/span><\/span>corpo de <\/b><\/span><\/span><\/span>massa 5 kg <\/b><\/span><\/span><\/span>e dimens\u00f5es desprez\u00edveis \u00e9 <\/b><\/span><\/span><\/span>abandonado, a partir do repouso<\/b><\/span><\/span><\/span>, de uma altura<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

de 25 m. <\/b><\/span><\/span><\/span>O objeto <\/b><\/span><\/span>cai em dire\u00e7\u00e3o ao solo devido \u00e0 a\u00e7\u00e3o da for\u00e7a gravitacional terrestre<\/b><\/span><\/span><\/span>. A <\/b><\/span><\/span>acelera\u00e7\u00e3ogravitacional<\/b><\/span><\/span><\/span> pode ser considerada constante e igual a <\/b><\/span><\/span>10 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

Sabendo que, <\/b><\/span><\/span>devido \u00e0s for\u00e7as de atrito, 20% da energia mec\u00e2nica inicial do corpo \u00e9 dissipada<\/b><\/span><\/span><\/span>ao longo da queda, o <\/b><\/span><\/span>m\u00f3dulo da velocidade do corpo, no instante imediatamente anterior \u00e0 colis\u00e3o com o solo, \u00e9 igual a <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

02-(UNITAU-SP-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Um corpo, <\/b><\/span><\/span><\/span>cujas dimens\u00f5es s\u00e3o desprez\u00edveis<\/b><\/span><\/span><\/span>, desloca-se ao longo de uma linha reta<\/b><\/span><\/span><\/span>. O <\/b><\/span><\/span>atrito entre o corpo e asuperf\u00edcie sobre a qual se desloca \u00e9 desprez\u00edvel, bem como o atrito entre o corpo e o ar<\/b><\/span><\/span><\/span>. A <\/b><\/span><\/span>posi\u00e7\u00e3o do corpo, em rela\u00e7\u00e3o a um referencial inercial, \u00e9 dada a cada instante de tempo por <\/b><\/span><\/span><\/span>x(t) = (3t -1)<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>, onde <\/b><\/span><\/span>x significa o espa\u00e7o percorrido em metros, e t, o tempo em segundos<\/b><\/span><\/span><\/span>. Nessascondi\u00e7\u00f5es, \u00e9 <\/b><\/span><\/span>CORRETO afirmar que a acelera\u00e7\u00e3o dessecorpo para t = 1s \u00e9 <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

03-(UNITAU-SP-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Uma part\u00edcula <\/b><\/span><\/span><\/span>move-se no <\/b><\/span><\/span>plano x-y <\/b><\/span><\/span><\/span>segundo as <\/b><\/span><\/span>equa\u00e7\u00f5es hor\u00e1rias x(t) = 40 + 50t e y(t) = 400 + 100t -5t<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>,<\/b><\/span><\/span><\/span> onde <\/b><\/span><\/span>x e y s\u00e3o medidos em metros, e, t, em segundos<\/b><\/span><\/span><\/span>. <\/b><\/span><\/span>Segundo essas equa\u00e7\u00f5es, \u00e9 <\/b><\/span><\/span><\/span>CORRETO afirmar: <\/b><\/span><\/span><\/span><\/p>\n

a) A <\/b><\/span><\/span><\/span>trajet\u00f3ria<\/b><\/span><\/span><\/span> da part\u00edcula \u00e9 uma <\/b><\/span><\/span><\/span>reta no plano x-y. <\/b><\/span><\/span><\/span><\/p>\n

b) O <\/b><\/span><\/span><\/span>m\u00f3dulo <\/b><\/span><\/span><\/span>da componente <\/b><\/span><\/span><\/span>x da velocidade <\/b><\/span><\/span><\/span>da part\u00edcula\u00e9 <\/b><\/span><\/span><\/span>constante e igual a 100 m\/s. <\/b><\/span><\/span><\/span><\/p>\n

c) O <\/b><\/span><\/span><\/span>m\u00f3dulo<\/b><\/span><\/span><\/span> da componente <\/b><\/span><\/span><\/span>y da velocidade da part\u00edcula<\/b><\/span><\/span><\/span>depende do tempo e, no instante <\/b><\/span><\/span><\/span>t = 0s, vale 50 m\/s. <\/b><\/span><\/span><\/span><\/p>\n

d) O <\/b><\/span><\/span><\/span>valor m\u00e1ximo da posi\u00e7\u00e3o positiva <\/b><\/span><\/span><\/span>ocupada pela part\u00edcula no <\/b><\/span><\/span><\/span>eixo-y \u00e9 900m<\/b><\/span><\/span><\/span>. <\/b><\/span><\/span><\/span><\/p>\n

e) A part\u00edcula encontra-se <\/b><\/span><\/span><\/span>em repouso no instante t = 10s.<\/b><\/span><\/span><\/span><\/p>\n

a) A <\/b><\/span><\/span><\/span>trajet\u00f3ria<\/b><\/span><\/span><\/span> da part\u00edcula \u00e9 uma <\/b><\/span><\/span><\/span>reta no plano x-y. <\/b><\/span><\/span><\/span><\/p>\n

04-(UNITAU-SP-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

No <\/b><\/span><\/span>sistema mec\u00e2nico <\/b><\/span><\/span><\/span>abaixo, os <\/b><\/span><\/span>dois blocos est\u00e3o inicialmente em repouso<\/b><\/span><\/span><\/span>. <\/b><\/span><\/span>Os blocos s\u00e3o, ent\u00e3o, <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

abandonados e caem at\u00e9 atingir o solo. <\/b><\/span><\/span><\/span><\/p>\n

Despreze qualquer forma de atrito e a resist\u00eancia do ar <\/b><\/span><\/span><\/span>e considere que as <\/b><\/span><\/span>massas s\u00e3o m<\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/sub><\/span> = 2m<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span>. <\/b><\/span><\/span><\/span><\/p>\n

Sobre o <\/b><\/span><\/span>m\u00f3dulo da acelera\u00e7\u00e3o dos blocos, \u00e9 totalmente CORRETO afirmar: <\/b><\/span><\/span><\/span><\/p>\n

a) <\/b><\/span><\/span><\/span>A <\/b><\/span><\/span>acelera\u00e7\u00e3o do bloco B \u00e9 igual \u00e0 acelera\u00e7\u00e3o gravitacional (g), <\/b><\/span><\/span><\/span>ao passo que <\/b><\/span><\/span>a de A \u00e9 igual \u00e0 g.sen \u03b8. <\/b><\/span><\/span><\/span><\/p>\n

b) <\/b><\/span><\/span><\/span>A <\/b><\/span><\/span>acelera\u00e7\u00e3o do bloco A \u00e9 igual \u00e0 acelera\u00e7\u00e3o gravitacional (g), <\/b><\/span><\/span><\/span>ao passo <\/b><\/span><\/span>que a de B \u00e9 igual \u00e0 g.sen \u03b8. <\/b><\/span><\/span><\/span><\/p>\n

c) <\/b><\/span><\/span><\/span>A <\/b><\/span><\/span>acelera\u00e7\u00e3o do bloco B \u00e9 igual \u00e0 acelera\u00e7\u00e3o gravitacional (g), <\/b><\/span><\/span><\/span>ao passo que <\/b><\/span><\/span>a de A \u00e9 igual \u00e0 g.cos \u03b8. <\/b><\/span><\/span><\/span><\/p>\n

d) <\/b><\/span><\/span><\/span>A <\/b><\/span><\/span>acelera\u00e7\u00e3o do bloco A \u00e9 igual \u00e0 acelera\u00e7\u00e3o gravitacional (g), <\/b><\/span><\/span><\/span>ao passo que <\/b><\/span><\/span>a de B \u00e9 igual \u00e0 g.cos \u03b8. <\/b><\/span><\/span><\/span><\/p>\n

e) <\/b><\/span><\/span><\/span>A <\/b><\/span><\/span>acelera\u00e7\u00e3o do bloco A \u00e9 igual \u00e0 acelera\u00e7\u00e3o do bloco B<\/b><\/span><\/span><\/span>, <\/b><\/span><\/span>sendo ambas iguais \u00e0 acelera\u00e7\u00e3o gravitacional (g). <\/b><\/span><\/span><\/span><\/p>\n

05-(UNITAU-SP-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Duas part\u00edculas de <\/b><\/span><\/span><\/span>massas m<\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/sub><\/span> e m<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span> est\u00e3o em repouso<\/b><\/span><\/span><\/span>, apoiadas sobre os blocos <\/b><\/span><\/span><\/span>C e D, respectivamente<\/b><\/span><\/span><\/span>. <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Sabendo que esse sistema est\u00e1 sobre a superf\u00edcie da Terra, onde <\/b><\/span><\/span><\/span>a acelera\u00e7\u00e3o local da gravidade pode ser considerada uniforme, \u00e9 CORRETO afirmar que<\/b><\/span><\/span><\/span><\/p>\n

a) a energia do <\/b><\/span><\/span><\/span>bloco A \u00e9 maior que a do bloco B<\/b><\/span><\/span><\/span>, mesmo que a massa m<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span>>m<\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/sub><\/span>. <\/b><\/span><\/span><\/span><\/p>\n

b) a energia do bloco B \u00e9 <\/b><\/span><\/span><\/span>menor que a do bloco A<\/b><\/span><\/span><\/span>, mesmo que a massa m<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span>>m<\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/sub><\/span>. <\/b><\/span><\/span><\/span><\/p>\n

c) o sistema, quando supostamente isolado do resto do Universo, <\/b><\/span><\/span><\/span>n\u00e3o possui qualquer forma de energ\u00eda. <\/b><\/span><\/span><\/span><\/p>\n

d) a <\/b><\/span><\/span><\/span>energia do bloco A pode ser igual \u00e0 energia do bloco B<\/b><\/span><\/span><\/span>, se a <\/b><\/span><\/span><\/span>raz\u00e3o entre a m<\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/sub><\/span> pela m<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span> for igual \u00e0 raz\u00e3o entre a altura do bloco D pela altura do bloco C, medidas com rela\u00e7\u00e3o ao solo. <\/b><\/span><\/span><\/span><\/p>\n

e) as <\/b><\/span><\/span><\/span>energias dos blocos A e Bnunca <\/b><\/span><\/span><\/span>podem ser iguais. <\/b><\/span><\/span><\/span><\/p>\n

06-(UNITAU-SP-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Um corpo de<\/b><\/span><\/span><\/span>massa m e calor espec\u00edfico c <\/b><\/span><\/span><\/span>\u00e9 colocado em <\/b><\/span><\/span>contato t\u00e9rmico com uma fonte de calor<\/b><\/span><\/span><\/span>, e<\/b><\/span><\/span><\/p>\n

\"\"<\/p>\n

todo essesistema <\/b><\/span><\/span>\u00e9 isolado do meio externo<\/b><\/span><\/span><\/span>. Considere que a <\/b><\/span><\/span>massa m \u00e9 s\u00f3lida no estado inicial, <\/b><\/span><\/span><\/span>onde a temperatura \u00e9 <\/b><\/span><\/span>\u03b8<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span> e funde em \u03b8<\/b><\/span><\/span><\/span>f<\/b><\/span><\/span><\/sub><\/span>com \u03b8<\/b><\/span><\/span><\/span>f<\/b><\/span><\/span><\/sub><\/span>>\u03b8<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>.<\/b><\/span><\/span><\/span>Com rela\u00e7\u00e3o a esse sistema, \u00e9 <\/b><\/span><\/span><\/span>CORRETO <\/b><\/span><\/span><\/span>afirmar: <\/b><\/span><\/span><\/span><\/p>\n

a) Quando <\/b><\/span><\/span><\/span>\u03b8>\u03b8<\/b><\/span><\/span><\/span>f<\/b><\/span><\/span><\/sub><\/span>d\u00e1-se in\u00edcio \u00e0 fus\u00e3o, e nessa fase a temperatura do corpo <\/b><\/span><\/span><\/span>continua a aumentar at\u00e9 que todo o corpo passe do estado s\u00f3lido ao l\u00edquido. <\/b><\/span><\/span><\/span><\/p>\n

b) A equa\u00e7\u00e3o <\/b><\/span><\/span><\/span>Q = mc\u2206\u03b8<\/b><\/span><\/span><\/span>\u00e9 usada em toda a fase do <\/b><\/span><\/span><\/span>processo de transforma\u00e7\u00e3o, ou seja, do estado s\u00f3lido ao l\u00edquido. <\/b><\/span><\/span><\/span><\/p>\n

c) Na <\/b><\/span><\/span><\/span>fus\u00e3o do estado s\u00f3lido ao l\u00edquido<\/b><\/span><\/span><\/span>, a <\/b><\/span><\/span><\/span>temperatura \u00e9 constante<\/b><\/span><\/span><\/span>, e o <\/b><\/span><\/span><\/span>calor recebido, que \u00e9 dado por Q = mc\u2206\u03b8, \u00e9 nulo. <\/b><\/span><\/span><\/span><\/p>\n

d) Na fus\u00e3o do <\/b><\/span><\/span><\/span>estado l\u00edquido ao gasoso<\/b><\/span><\/span><\/span>, a equa\u00e7\u00e3o para o calor total recebido, durante a mudan\u00e7a de estado, \u00e9 dada pela equa\u00e7\u00e3o Q = mc\u2206\u03b8. <\/b><\/span><\/span><\/span><\/p>\n

e) Durante o processo de <\/b><\/span><\/span><\/span>fus\u00e3o do estado s\u00f3lido ao l\u00edquido, a temperatura permanece constante <\/b><\/span><\/span><\/span>durante todo o processo e, logo em seguida, <\/b><\/span><\/span><\/span>come\u00e7a a subir novamente<\/b><\/span><\/span><\/span>, para alcan\u00e7ar a temperatura cr\u00edtica, <\/b><\/span><\/span><\/span>dando in\u00edcio \u00e0 pr\u00f3xima mudan\u00e7a de estado<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

07-(UNITAU-SP-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Considere tr\u00eas resist\u00eancias \u00f4hmicas R<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span>, R<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span> e R<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sub><\/span>. <\/b><\/span><\/span><\/span>Quando esses <\/b><\/span><\/span>tr\u00eas componentes s\u00e3o ligados em <\/b><\/span><\/span><\/span>paralelo<\/b><\/span><\/span><\/span> em um circuito com uma diferen\u00e7a de potencial <\/b><\/span><\/span><\/span>(d.d.p.) de 100V<\/b><\/span><\/span><\/span>, a soma das correntes el\u00e9tricas que passam por cada uma das componentes \u00e9 tal <\/b><\/span><\/span><\/span>que i<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span>+ i<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span> + i<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sub><\/span> = 55A<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Quando as <\/b><\/span><\/span>mesmas tr\u00eas resist\u00eancias<\/b><\/span><\/span><\/span> s\u00e3o ligadas em <\/b><\/span><\/span><\/span>s\u00e9rie,<\/b><\/span><\/span><\/span> em um circuito, a uma <\/b><\/span><\/span><\/span>(d.d.p.) de 190V<\/b><\/span><\/span><\/span>, a <\/b><\/span><\/span>corrente <\/b><\/span><\/span><\/span>que passa pelas resist\u00eancias \u00e9 de <\/b><\/span><\/span><\/span>10A.<\/b><\/span><\/span><\/span>Se <\/b><\/span><\/span>R<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span>= 4\u2126, os valores das demais resist\u00eancias s\u00e3o<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

<\/a> 08-(UNITAU-SP-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

O <\/b><\/span><\/span>efeito fotoel\u00e9trico <\/b><\/span><\/span><\/span>\u00e9 um fen\u00f4meno estudado pelos f\u00edsicos, e a explica\u00e7\u00e3o <\/b><\/span><\/span><\/span>atualmente aceita foi dada<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

por Albert Einstein no ano de 1905. Sobre a teoria <\/b><\/span><\/span><\/span>de Einstein para o efeito fotoel\u00e9trico, \u00e9 totalmente <\/b><\/span><\/span><\/span>CORRETO<\/b><\/span><\/span><\/span> afirmar <\/b><\/span><\/span><\/span>que<\/b><\/span><\/span><\/p>\n

a) est\u00e1 totalmente de acordo com a teoria de <\/b><\/span><\/span><\/span>Huygens, sobre a luz como fen\u00f4meno ondulat\u00f3rio<\/b><\/span><\/span><\/span>. <\/b><\/span><\/span><\/span><\/p>\n

b) est\u00e1 totalmente de acordo com a teoria de <\/b><\/span><\/span><\/span>Newton, sobre a luz como fen\u00f4meno corpuscular. <\/b><\/span><\/span><\/span><\/p>\n

c) introduziu o conceito de <\/b><\/span><\/span><\/span>onda-part\u00edcula, para explicar o comportamento dos f\u00f3tons. <\/b><\/span><\/span><\/span><\/p>\n

d) introduziu o conceito de <\/b><\/span><\/span><\/span>intera\u00e7\u00e3o fraca, para explicar o comportamento dos f\u00f3tons. <\/b><\/span><\/span><\/span><\/p>\n

e) introduziu o conceito de que o <\/b><\/span><\/span><\/span>tempo \u00e9 relativo<\/b><\/span><\/span><\/span>, para explicar o <\/b><\/span><\/span><\/span>comportamento dos f\u00f3tons. <\/b><\/span><\/span><\/span><\/p>\n

09-(UNITAU-SP-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Uma chapa retangular delgada tem lados de <\/b><\/span><\/span><\/span>comprimentos a<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span> e b<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>, quando est\u00e1 \u00e0 temperatura <\/b><\/span><\/span><\/span>\u03b8<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>.<\/b><\/span><\/span><\/span> O <\/b><\/span><\/span>coeficiente de dilata\u00e7\u00e3o linear <\/b><\/span><\/span><\/span>do material de que \u00e9 feita essa chapa \u00e9 <\/b><\/span><\/span><\/span>\u03b1.<\/b><\/span><\/span><\/span><\/p>\n

Ao considerar a chapa sujeita a uma <\/b><\/span><\/span><\/span>varia\u00e7\u00e3o de temperatura \u2206\u03b8<\/b><\/span><\/span><\/span>, <\/b><\/span><\/span><\/span>e desprezando qualquer aproxima\u00e7\u00e3o matem\u00e1tica, pode-se dizer que o <\/b><\/span><\/span>coeficiente de dilata\u00e7\u00e3o superficial \u03b2 da chapa \u00e9 dado por<\/b><\/span><\/span><\/span><\/p>\n

a<\/b><\/span><\/span><\/span>) <\/b><\/span><\/span>\u03b2 = 2\u03b1 + \u03b1<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>(\u2206\u03b8<\/b><\/span><\/span><\/span>) e <\/b><\/span><\/span>n\u00e3o depender\u00e1 da temperatura. <\/b><\/span><\/span><\/span><\/p>\n

b) <\/b><\/span><\/span><\/span>\u03b2 = 2\u03b1 + \u03b1(\u2206\u03b8)<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>e <\/b><\/span><\/span>n\u00e3o depender\u00e1 da temperatura. <\/b><\/span><\/span><\/span><\/p>\n

c) <\/b><\/span><\/span><\/span>\u03b2 = 2\u03b1 <\/b><\/span><\/span><\/span>e <\/b><\/span><\/span>n\u00e3o depender\u00e1 da temperatura. <\/b><\/span><\/span><\/span><\/p>\n

d) <\/b><\/span><\/span><\/span>\u03b2 = 2\u03b1(\u2206\u03b8<\/b><\/span><\/span><\/span>) e <\/b><\/span><\/span>depender\u00e1 da temperatura. <\/b><\/span><\/span><\/span><\/p>\n

e) <\/b><\/span><\/span><\/span>\u03b2 = 2\u03b1 + \u03b1<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>(\u2206\u03b8) <\/b><\/span><\/span><\/span>e <\/b><\/span><\/span>depender\u00e1 da temperatura<\/b><\/span><\/span><\/span><\/p>\n

 <\/p>\n

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

Universidade de Taubat\u00e9\u00a0(Unitau) \u00e9 uma\u00a0autarquia\u00a0educacional\u00a0brasileira\u00a0pertencente ao governo municipal de\u00a0Taubat\u00e9(SP), com diversas unidades espalhadas pelo\u00a0munic\u00edpio\u00a0contando bem como com\u00a0campi\u00a0nos munic\u00edpios de\u00a0Ubatuba,\u00a0S\u00e3o Jos\u00e9 dos Campos,\u00a0Mogi Gua\u00e7u\u00a0(S\u00e3o Paulo) e Bel\u00e9m (Par\u00e1). Formou, ao todo, mais de 90 mil\u00a0alunos, sendo a maior universidade do cone leste paulista e uma das mais tradicionais do\u00a0interior de S\u00e3o Paulo. \u00c9 a primeira e maior universidade p\u00fablica de car\u00e1ter<\/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-206","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/206","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=206"}],"version-history":[{"count":2,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/206\/revisions"}],"predecessor-version":[{"id":212,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/206\/revisions\/212"}],"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=206"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}