{"id":4785,"date":"2019-11-07T03:06:44","date_gmt":"2019-11-07T03:06:44","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=4785"},"modified":"2024-07-11T14:16:02","modified_gmt":"2024-07-11T14:16:02","slug":"uergs-2019","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/universidades-2019\/uergs-2019\/","title":{"rendered":"UERGS – 2019"},"content":{"rendered":"

UERGS – 2019<\/b><\/span><\/span><\/span><\/p>\n

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A\u00a0<\/b><\/span><\/span><\/span>Universidade Estadual do Rio Grande do Sul (UERGS)<\/b><\/span><\/span><\/span>\u00a0\u00e9 uma\u00a0institui\u00e7\u00e3o de ensino superior<\/a>\u00a0p\u00fablica e multicampi, com vinte e quatro unidades distribu\u00eddas pelo estado\u00a0brasileiro<\/a>\u00a0do\u00a0Rio Grande do Sul<\/a>. Vinculada \u00e0 Secretaria de Ci\u00eancia, Inova\u00e7\u00e3o e Desenvolvimento Tecnol\u00f3gico, a Universidade oferta vinte e dois cursos de\u00a0gradua\u00e7\u00e3o<\/a>\u00a0(em dados de 2012), tendo cerca de 3926 alunos regularmente matriculados. Com sua\u00a0reitoria<\/a>\u00a0sediada na cidade de\u00a0Porto Alegre<\/a>\u00a0\u2014 a\u00a0capital<\/a>\u00a0do Estado \u2014, a UERGS mant\u00e9m seus cursos nas cidades: Alegrete, Bag\u00e9, Bento Gon\u00e7alves, Cachoeira do Sul (que al\u00e9m de seu campi, conta com esta\u00e7\u00e3o Agron\u00f4mica), Caxias do Sul, Cruz Alta, Encantado, Erechim, Frederico Westphalen, Gua\u00edba, Litoral Norte – Os\u00f3rio, Montenegro, Novo Hamburgo, Porto Alegre, Sananduva, Santa Cruz do Sul, Santana do Livramento, S\u00e3o Borja, S\u00e3o Francisco de Paula, S\u00e3o Luiz Gonzaga, Soledade,Tapes, Tr\u00eas Passos, Vacaria.<\/b><\/span><\/span><\/span><\/p>\n

A UERGS reserva 50% do total de suas vagas para candidatos de\u00a0baixa renda<\/a>\u00a0e 10% para\u00a0pessoas com necessidades especiais<\/a>.<\/b><\/span><\/span><\/span><\/p>\n

Conforme dados do \u00cdndice Geral de Cursos (IGC) de 2011, elaborado pelo\u00a0Minist\u00e9rio da Educa\u00e7\u00e3o<\/a>\u00a0(MEC), a UERGS obteve a sexta maior nota entre as universidades p\u00fablicas do Estado. No mesmo ano, pelos resultados do\u00a0Exame Nacional de Desempenho de Estudantes (Enade)<\/a>, o Curso Superior de Tecnologia em Automa\u00e7\u00e3o Industrial, oferecido na Unidade da Uergs em Novo Hamburgo, foi considerado como o melhor do Brasil, sendo o \u00fanico no Pa\u00eds com \u00edndice 5, a nota m\u00e1xima no C\u00f3digo Preliminar de Cursos.<\/b><\/span><\/span><\/span><\/p>\n

01- (<\/b><\/span><\/span><\/span>Universidade Estadual do Rio Grande do Sul \u2013 UERGS \u2013 019)<\/b><\/span><\/span><\/span><\/p>\n

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Considere o gr\u00e1fico v = f(t<\/b><\/span><\/span><\/span>) e as <\/b><\/span><\/span><\/span>afirma\u00e7\u00f5es a seguir.<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

I \u2013<\/b><\/span><\/span><\/span> <\/b>A <\/b><\/span><\/span><\/span>dist\u00e2ncia percorrida no intervalo de 0 s a 4 s \u00e9 a mesma que no intervalo de 6 s a 10 s. <\/b><\/span><\/span><\/span><\/p>\n

II<\/b><\/span><\/span><\/span> \u2013 <\/b><\/span><\/span><\/span>A <\/b><\/span><\/span><\/span>velocidade \u00e9 nula no instante 4 s<\/b><\/span><\/span><\/span> e a <\/b><\/span><\/span><\/span>acelera\u00e7\u00e3o \u00e9 a mesma no intervalo de 0 s a 6 s. <\/b><\/span><\/span><\/span><\/p>\n

III \u2013<\/b><\/span><\/span><\/span> <\/b>A <\/b><\/span><\/span><\/span>acelera\u00e7\u00e3o \u00e9 positiva no intervalo de 0 s a 4 s <\/b><\/span><\/span><\/span>e <\/b><\/span><\/span><\/span>negativa no intervalo de 4 s a 6 s. <\/b><\/span><\/span><\/span><\/p>\n

Quais est\u00e3o corretas? <\/b><\/span><\/span><\/span><\/p>\n

A) <\/b><\/span><\/span><\/span>Apenas I. <\/b><\/span><\/span><\/span><\/p>\n

B) <\/b><\/span><\/span><\/span>Apenas II <\/b><\/span><\/span><\/span><\/p>\n

C) <\/b><\/span><\/span><\/span>Apenas III. <\/b><\/span><\/span><\/span><\/p>\n

D) <\/b><\/span><\/span><\/span>Apenas I e II. <\/b><\/span><\/span><\/span><\/p>\n

E) <\/b><\/span><\/span><\/span>Apenas II e III.<\/b><\/span><\/span><\/span><\/p>\n

02- (<\/b><\/span><\/span><\/span>Universidade Estadual do Rio Grande do Sul \u2013 UERGS \u2013 019)<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Uma revista especializada em autom\u00f3veis informa que determinado carro necessita<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

70 m para conseguir parar, estando com uma velocidade de 120 km\/h. <\/b><\/span><\/span><\/span><\/p>\n

Isso significa que sua acelera\u00e7\u00e3o na frenagem \u00e9, aproximadamente, <\/b><\/span><\/span><\/span><\/p>\n

A) <\/b><\/span><\/span><\/span>– 9,7 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> <\/b>B) <\/b><\/span><\/span><\/span>– 7,9 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> <\/b>C) <\/b><\/span><\/span><\/span>– 2,2 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> <\/b>D) <\/b><\/span><\/span><\/span>– 1,7 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> <\/b>E) <\/b><\/span><\/span><\/span>– 0,60 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

03- (<\/b><\/span><\/span><\/span>Universidade Estadual do Rio Grande do Sul \u2013 UERGS \u2013 019)<\/b><\/span><\/span><\/span><\/p>\n

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Considerando-se g = 10 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> e a for\u00e7a de atrito com o ar desprez\u00edvel,<\/b><\/span><\/span><\/span> a <\/b><\/span><\/span><\/span>for\u00e7a vertical<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

para cima, necess\u00e1ria para erguer um corpo de 4,0 kg com uma acelera\u00e7\u00e3o de 2,0 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> <\/b>\u00e9<\/b><\/span><\/span><\/span><\/p>\n

A) <\/b><\/span><\/span><\/span>8,0 N <\/b><\/span><\/span><\/span>B) <\/b><\/span><\/span><\/span>16 N <\/b><\/span><\/span><\/span>C) <\/b><\/span><\/span><\/span>32 N <\/b><\/span><\/span><\/span>D) <\/b><\/span><\/span><\/span>40 N <\/b><\/span><\/span><\/span>E) <\/b><\/span><\/span><\/span>48 N<\/b><\/span><\/span><\/span><\/p>\n

04- (<\/b><\/span><\/span><\/span>Universidade Estadual do Rio Grande do Sul \u2013 UERGS \u2013 019)<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Sabe-se que a <\/b><\/span><\/span><\/span>massa espec\u00edfica do ouro \u00e9 19,3 g\/cm<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span>. <\/b><\/span><\/span><\/span><\/p>\n

Assim, a <\/b><\/span><\/span><\/span>press\u00e3o exercida por um paralelep\u00edpedo de ouro com arestas de 5,0 cm, 10,0 cm e 20,0 cm,<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

apoiado na menor das faces <\/b><\/span><\/span><\/span>e <\/b><\/span><\/span><\/span>considerando-se g = 10 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>, <\/b><\/span><\/span><\/span>ser\u00e1 de, aproximadamente<\/b><\/span><\/span><\/span>, <\/b><\/span><\/span><\/span><\/p>\n

A) <\/b><\/span><\/span><\/span>1,9×10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> Pa <\/b><\/span><\/span><\/span><\/p>\n

B) <\/b><\/span><\/span><\/span>1,9×10<\/b><\/span><\/span><\/span>6<\/b><\/span><\/span><\/sup><\/span> Pa <\/b><\/span><\/span><\/span><\/p>\n

C) <\/b><\/span><\/span><\/span>3,9×10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> Pa <\/b><\/span><\/span><\/span><\/p>\n

D) <\/b><\/span><\/span><\/span>3,9×10<\/b><\/span><\/span><\/span>4<\/b><\/span><\/span><\/sup><\/span> Pa <\/b><\/span><\/span><\/span><\/p>\n

E) <\/b><\/span><\/span><\/span>3,9×10<\/b><\/span><\/span><\/span>6<\/b><\/span><\/span><\/sup><\/span> Pa <\/b><\/span><\/span><\/span><\/p>\n

05- (<\/b><\/span><\/span><\/span>Universidade Estadual do Rio Grande do Sul \u2013 UERGS \u2013 019)<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Muitas pessoas, na sua fala di\u00e1ria, usam express\u00f5es que denunciam conceitos f\u00edsicos ERRADOS. Assinale a alternativa que N\u00c3O apresenta erro conceitual. <\/b><\/span><\/span><\/span><\/p>\n

A) <\/b><\/span><\/span><\/span>Uma chapa de ferro a 100 \u00baC cont\u00e9m mais calor do que outra a 50 \u00baC. <\/b><\/span><\/span><\/span><\/p>\n

B) <\/b><\/span><\/span><\/span>Boas garrafas t\u00e9rmicas t\u00eam pequeno calor espec\u00edfico. <\/b><\/span><\/span><\/span><\/p>\n

C) <\/b><\/span><\/span><\/span>Durante as mudan\u00e7as de fase, a temperatura de uma subst\u00e2ncia permanece constante. <\/b><\/span><\/span><\/span><\/p>\n

D) <\/b><\/span><\/span><\/span>O calor latente \u00e9 expresso em calorias. <\/b><\/span><\/span><\/span><\/p>\n

E) <\/b><\/span><\/span><\/span>O empuxo \u00e9 a for\u00e7a de baixo para cima exercida por um l\u00edquido em um corpo submerso e faz com que o peso (for\u00e7a de atra\u00e7\u00e3o da Terra) diminua.<\/b><\/span><\/span><\/span><\/p>\n

06- (<\/b><\/span><\/span><\/span>Universidade Estadual do Rio Grande do Sul \u2013 UERGS \u2013 019)<\/b><\/span><\/span><\/span><\/p>\n

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Sabe-se que o calor latente de fus\u00e3o do gelo \u00e9 80 cal\/g <\/b><\/span><\/span><\/span>e o <\/b><\/span><\/span><\/span>calor espec\u00edfico da \u00e1gua \u00e9 1,0 cal\/g.\u00baC<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Assim, se <\/b><\/span><\/span><\/span>forem fornecidas 10 kcal a um bloco de gelo de 100 g, que est\u00e1 a 0 \u00baC, <\/b><\/span><\/span><\/span><\/p>\n

A) <\/b><\/span><\/span><\/span>todo o gelo derreter\u00e1, e a temperatura final da \u00e1gua ser\u00e1 20 \u00baC. <\/b><\/span><\/span><\/span><\/p>\n

B) <\/b><\/span><\/span><\/span>todo o gelo derreter\u00e1, e a temperatura final da \u00e1gua ser\u00e1 15 \u00baC. <\/b><\/span><\/span><\/span><\/p>\n

C) <\/b><\/span><\/span><\/span>todo o gelo derreter\u00e1, e a temperatura final da \u00e1gua ser\u00e1 10 \u00baC. <\/b><\/span><\/span><\/span><\/p>\n

D) <\/b><\/span><\/span><\/span>todo o gelo derreter\u00e1, e ent\u00e3o haver\u00e1 somente \u00e1gua a 0 \u00baC. <\/b><\/span><\/span><\/span><\/p>\n

E) <\/b><\/span><\/span><\/span>somente parte do gelo derreter\u00e1, e ent\u00e3o haver\u00e1 gelo a 0 \u00baC e uma por\u00e7\u00e3o de \u00e1gua com temperatura superior a 0 \u00baC. <\/b><\/span><\/span><\/span><\/p>\n

07- (<\/b><\/span><\/span><\/span>Universidade Estadual do Rio Grande do Sul \u2013 UERGS \u2013 019)<\/b><\/span><\/span><\/span><\/p>\n

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O <\/b><\/span><\/span><\/span>campo el\u00e9trico, o potencial el\u00e9trico e o trabalho el\u00e9trico s\u00e3o grandezas estudadas na Eletricidade.<\/b><\/span><\/span><\/span> <\/b><\/p>\n

Quanto a sua natureza, elas s\u00e3o, respectivamente, <\/b><\/span><\/span><\/span><\/p>\n

A) <\/b><\/span><\/span><\/span>vetorial, escalar e escalar. <\/b><\/span><\/span><\/span><\/p>\n

B) <\/b><\/span><\/span><\/span>vetorial, escalar e vetorial. <\/b><\/span><\/span><\/span><\/p>\n

C) <\/b><\/span><\/span><\/span>vetorial, vetorial e escalar. <\/b><\/span><\/span><\/span><\/p>\n

D) <\/b><\/span><\/span><\/span>escalar, vetorial e escalar. <\/b><\/span><\/span><\/span><\/p>\n

E) <\/b><\/span><\/span><\/span>escalar, escalar e vetorial.<\/b><\/span><\/span><\/span><\/p>\n

08- (<\/b><\/span><\/span><\/span>Universidade Estadual do Rio Grande do Sul \u2013 UERGS \u2013 019)<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Um resistor \u00f4hmico ligado a uma tens\u00e3o de 20 V desenvolve uma pot\u00eancia de 300 W<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

A <\/b><\/span><\/span><\/span>corrente que circula pelo resistor<\/b><\/span><\/span><\/span> e a <\/b><\/span><\/span><\/span>energia gasta em um minuto s\u00e3o, respectivamente<\/b><\/span><\/span><\/span>, <\/b><\/span><\/span><\/span><\/p>\n

A) <\/b><\/span><\/span><\/span>6 A e 300 J <\/b><\/span><\/span><\/span><\/p>\n

B) <\/b><\/span><\/span><\/span>6 A e 6000 J <\/b><\/span><\/span><\/span><\/p>\n

C) <\/b><\/span><\/span><\/span>6 A e 18000 J <\/b><\/span><\/span><\/span><\/p>\n

D) <\/b><\/span><\/span><\/span>15 A e 6000 J <\/b><\/span><\/span><\/span><\/p>\n

E) <\/b><\/span><\/span><\/span>15 A e 18000 J <\/b><\/span><\/span><\/span><\/p>\n

09- (<\/b><\/span><\/span><\/span>Universidade Estadual do Rio Grande do Sul \u2013 UERGS \u2013 019)<\/b><\/span><\/span><\/span><\/p>\n

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Um aluno recebeu uma lente convergente<\/b><\/span><\/span><\/span> com <\/b><\/span><\/span><\/span>dist\u00e2ncia focal de 12 cm <\/b><\/span><\/span><\/span>e <\/b><\/span><\/span><\/span>colocou-a a 6 cm de um objeto. <\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Se<\/b><\/span><\/span><\/span> a <\/b><\/span><\/span><\/span>lente estiver entre o observador e o objeto<\/b><\/span><\/span><\/span> (caso da lupa), a <\/b><\/span><\/span><\/span>imagem observada ser\u00e1 <\/b><\/span><\/span><\/span><\/p>\n

A) <\/b><\/span><\/span><\/span>virtual, direita e menor. <\/b><\/span><\/span><\/span><\/p>\n

B) <\/b><\/span><\/span><\/span>virtual, direita e maior. <\/b><\/span><\/span><\/span><\/p>\n

C) <\/b><\/span><\/span><\/span>virtual, invertida e menor. <\/b><\/span><\/span><\/span><\/p>\n

D) <\/b><\/span><\/span><\/span>real, invertida e menor. <\/b><\/span><\/span><\/span><\/p>\n

E) <\/b><\/span><\/span><\/span>real, direita e maior.<\/b><\/span><\/span><\/span><\/p>\n

Resolu\u00e7\u00e3o comentada das quest\u00f5es de F\u00edsica da <\/span><\/span><\/span>Universidade Estadual do Rio Grande do Sul \u2013 UERGS \u2013 019<\/span><\/span><\/span><\/p>\n

01-<\/span><\/span><\/span><\/p>\n

I. Falsa <\/b><\/span><\/span><\/span><\/p>\n

A <\/b><\/span><\/span><\/span>dist\u00e2ncia percorrida entre 0 s e 4 s corresponde \u00e0 \u00e1rea hachurada A<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span> do tri\u00e2ng<\/b><\/span><\/span><\/span>ulo <\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span> = b.h\/2 <\/b><\/span><\/span><\/span>=<\/b><\/span><\/span><\/span><\/p>\n

4×8\/2 A<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span> = 16 <\/b><\/span><\/span><\/span>d<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span> = 16 m.<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

A <\/b><\/span><\/span><\/span>dist\u00e2ncia percorrida entre 6 s e 10 s corresponde \u00e0 \u00e1rea hachurada A<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span> do ret\u00e2ngulo <\/b><\/span><\/span><\/span> <\/b>A<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span> = b.h <\/b><\/span><\/span><\/span>=<\/b><\/span><\/span><\/span><\/p>\n

(10 \u2013 6).(- 4) A<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span> = 4.(-4) <\/b><\/span><\/span><\/span>d<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span> = – 16 m.<\/b><\/span><\/span><\/span><\/p>\n

d<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span> <\/b><\/span><\/span><\/span> d<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

II. Correta<\/b><\/span><\/span><\/span><\/p>\n

No <\/b><\/span><\/span><\/span>instante 4 s a velocidade \u00e9 nula<\/b><\/span><\/span><\/span> (veja gr\u00e1fico) e, <\/b><\/span><\/span><\/span>entre 0 s e 6 s a acelera\u00e7\u00e3o \u00e9 a mesma <\/b><\/span><\/span><\/span>(mesma inclina\u00e7\u00e3o da reta).<\/b><\/span><\/span><\/span><\/p>\n

III. Falsa<\/b><\/span><\/span><\/span><\/p>\n

Veja (II).<\/b><\/span><\/span><\/span><\/p>\n

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

02-<\/span><\/span><\/span><\/p>\n

<\/p>\n

S\u00e3o dados:<\/b><\/span><\/span><\/span><\/p>\n

S = 70 m<\/b><\/span><\/span><\/span>; <\/b><\/span><\/span><\/span>V<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span> <\/b>= 120 km\/h\/3,6 <\/b><\/span><\/span><\/span>= 33,33 m\/s<\/b><\/span><\/span><\/span>; <\/b><\/span><\/span><\/span>V = 0 <\/b><\/span><\/span><\/span>(ele para no final) e <\/b><\/span><\/span><\/span>a = ?<\/b><\/span><\/span><\/span><\/p>\n

Pelos dados voc\u00ea pode utilizar a equa\u00e7\u00e3o de Torricelli <\/b><\/span><\/span><\/span> <\/b>V<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> = V<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>2<\/b><\/span><\/span><\/sup><\/span> + 2.a.S <\/b><\/span><\/span><\/span> 0<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> = (33,33)<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> + 2.a.70 <\/b><\/span><\/span><\/span><\/p>\n

0 = 1110,9 + 140.a a = – 1110,9\/140 <\/b><\/span><\/span><\/span>a = – 7,93 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

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

03-<\/span><\/span><\/span><\/p>\n

As <\/b><\/span><\/span><\/span>for\u00e7as que agem sobre o corpo s\u00e3o F <\/b><\/span><\/span><\/span>(vertical e para cima) <\/b><\/span><\/span><\/span>pedida,<\/b><\/span><\/span><\/span> e o <\/b><\/span><\/span><\/span>peso P<\/b><\/span><\/span><\/span> (vertical e para baixo), <\/b><\/span><\/span><\/span>de intensidade P = m.g <\/b><\/span><\/span><\/span>= 4.10 <\/b><\/span><\/span><\/span>= 40 N.<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Pela <\/b><\/span><\/span><\/span>segunda lei de Newton F<\/b><\/span><\/span><\/span>R<\/b><\/span><\/span><\/sub><\/span> = m.a <\/b><\/span><\/span><\/span> como <\/b><\/span><\/span><\/span>ele sobe <\/b><\/span><\/span><\/span>com <\/b><\/span><\/span><\/span>acelera\u00e7\u00e3o de a = 2 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>, F > P <\/b><\/span><\/span><\/span>e a <\/b><\/span><\/span><\/span>intensidade da for\u00e7a resultante ser\u00e1 F \u2013P= m.a <\/b><\/span><\/span><\/span> F \u2013 40 = 4.2 <\/b><\/span><\/span><\/span>F <\/b><\/span><\/span><\/span>= 40 + 8 <\/b><\/span><\/span><\/span>= 48 N.<\/b><\/span><\/span><\/span><\/p>\n

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

04-<\/b><\/span><\/span><\/span><\/p>\n

Volume do paralelep\u00edpedo = arestaxarestaxaresta<\/b><\/span><\/span><\/span> V = 0,05×0,1×0,2 <\/b><\/span><\/span><\/span>V = 0,001 = 10<\/b><\/span><\/span><\/span>-3<\/b><\/span><\/span><\/sup><\/span> m<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

d = m\/V <\/b><\/span><\/span><\/span> 19,3.10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> kg\/m<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> = m\/10<\/b><\/span><\/span><\/span>-3<\/b><\/span><\/span><\/sup><\/span> m<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> <\/b><\/span><\/span><\/span>m<\/b><\/span><\/span><\/span> = 19,3.10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span>.10<\/b><\/span><\/span><\/span>-3<\/b><\/span><\/span><\/sup><\/span> <\/b>= 19,3 kg.<\/b><\/span><\/span><\/span><\/p>\n

\u00c1rea da menor das faces A = 0,05×0,1 <\/b><\/span><\/span><\/span>= 0,005 <\/b><\/span><\/span><\/span>= 5.10<\/b><\/span><\/span><\/span>-3<\/b><\/span><\/span><\/sup><\/span> m<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> <\/b><\/span><\/span><\/span> a <\/b><\/span><\/span><\/span>for\u00e7a que faz a press\u00e3o \u00e9 o peso do paralelep\u00edpedo dado por P = m.g <\/b><\/span><\/span><\/span>= 19,3.10 <\/b><\/span><\/span><\/span>P = 193 N. <\/b><\/span><\/span><\/span><\/p>\n

Press\u00e3o = for\u00e7a\/\u00e1rea P = F\/A<\/b><\/span><\/span><\/span> <\/b><\/span><\/span><\/span>P <\/b><\/span><\/span><\/span>= 193\/5.10<\/b><\/span><\/span><\/span>-3<\/b><\/span><\/span><\/sup><\/span> <\/b>= 3,86.10<\/b><\/span><\/span><\/span>4<\/b><\/span><\/span><\/sup><\/span> Pa.<\/b><\/span><\/span><\/span><\/p>\n

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

05-<\/span><\/span><\/span><\/p>\n

A. Falsa<\/b><\/span><\/span><\/span> <\/b><\/span><\/span><\/span> observe pela <\/b><\/span><\/span><\/span>equa\u00e7\u00e3o fundamental da calorimetria (Q = m.c.) <\/b><\/span><\/span><\/span>que a <\/b><\/span><\/span><\/span>quantidade de calor depende al\u00e9m da temperatura tamb\u00e9m da massa das chapas de ferro que n\u00e3o foram fornecidas<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

B. Falsa<\/b><\/span><\/span><\/span> <\/b><\/span><\/span><\/span> fa\u00e7a uma <\/b><\/span><\/span><\/span>analogia com as informa\u00e7\u00f5es abaixo:<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Boas garrafas t\u00e9rmicas t\u00eam <\/b><\/span><\/span><\/span>grande<\/b><\/span><\/span><\/span> calor espec\u00edfico.<\/b><\/span><\/span><\/span><\/p>\n

C. Correta<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

D. Falsa<\/b><\/span><\/span><\/span> <\/b><\/span><\/span><\/span> <\/b>Q = m.L L = Q\/m = calorias\/grama.<\/b><\/span><\/span><\/span><\/p>\n

E. Falsa<\/b><\/span><\/span><\/span> <\/b><\/span><\/span><\/span> a <\/b><\/span><\/span><\/span>for\u00e7a peso \u00e9 constante em cada ponto da superf\u00edcie da Terra.<\/b><\/span><\/span><\/span><\/p>\n

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

06-<\/span><\/span><\/span><\/p>\n

Para fundir totalmente a massa de m = 100 g ser\u00e1 necess\u00e1rio Q = m.L <\/b><\/span><\/span><\/span>= 100.80 <\/b><\/span><\/span><\/span>Q <\/b><\/span><\/span><\/span>= 8 000 cal = <\/b><\/span><\/span><\/span><\/p>\n

8 kcal <\/b><\/span><\/span><\/span>(essa quantidade de calor derrete toda a \u00e1gua).<\/b><\/span><\/span><\/span><\/p>\n

Sobram ainda Q = <\/b><\/span><\/span><\/span>10 kcal \u2013 8 kcal = 2 kcal <\/b><\/span><\/span><\/span>= 2000 cal para aquecer as 100 g de \u00e1gua de 0 <\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sup><\/span>C at\u00e9 t <\/b><\/span><\/span><\/span><\/p>\n

Q = mc(t \u2013 t<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>) <\/b><\/span><\/span><\/span> 2000 = 100.1.(t \u2013 0) 2000 = 100t <\/b><\/span><\/span><\/span> t = 20 <\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sup><\/span>C.<\/b><\/span><\/span><\/span><\/p>\n

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

07-<\/span><\/span><\/span><\/p>\n

Caracter\u00edsticas do <\/b><\/span><\/span><\/span>Vetor<\/b><\/span><\/span><\/span> Campo El\u00e9trico<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

<\/p>\n

Potencial el\u00e9trico (V) de uma carga fonte (Q)<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

<\/p>\n

Express\u00f5es do trabalho W e da diferen\u00e7a de potencial U de um campo el\u00e9trico vari\u00e1vel e de um campo el\u00e9trico uniforme<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

<\/p>\n

Observe nas express\u00f5es acima que, se o potencial el\u00e9trico \u00e9 uma grandeza escalar, o trabalho da for\u00e7a el\u00e9trica tamb\u00e9m ser\u00e1 uma grandeza escalar.<\/b><\/span><\/span><\/span><\/p>\n

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

08-<\/span><\/span><\/span><\/p>\n

F\u00f3rmulas \u2013 Lei de Ohm<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

<\/p>\n

S\u00e3o dados: U = 20 V, P = 300 W e t = 1 min = 60 s.<\/b><\/span><\/span><\/span><\/p>\n

P = i.U <\/b><\/span><\/span><\/span> 300 = i.20 <\/b><\/span><\/span><\/span> i <\/b><\/span><\/span><\/span>= 300\/20 <\/b><\/span><\/span><\/span>= 15 A.<\/b><\/span><\/span><\/span><\/p>\n

Energia = pot\u00eanciaxtempo <\/b><\/span><\/span><\/span> <\/b>W <\/b><\/span><\/span><\/span>= 300×60 <\/b><\/span><\/span><\/span>= 18000 J<\/b><\/span><\/span><\/span><\/p>\n

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

09-<\/span><\/span><\/span><\/p>\n

Objeto O entre f = 12 cm\u00a0e a 6 cm da lente convergente<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Natureza\u00a0<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>Virtual<\/b><\/span><\/span><\/span>\u00a0(obtida no\u00a0<\/b><\/span><\/span><\/span>cruzamento dos prolongamentos<\/b><\/span><\/span><\/span>\u00a0dos raios luminosos).<\/b><\/span><\/span><\/span><\/p>\n

Localiza\u00e7\u00e3o\u00a0\u00a0Antes de f<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span><\/p>\n

Tamanho e orienta\u00e7\u00e3o\u00a0\u00a0maior\u00a0que o objeto e\u00a0direita\u00a0em rela\u00e7\u00e3o a ele.<\/b><\/span><\/span><\/span><\/p>\n

Utilidade<\/b><\/span><\/span><\/span><\/p>\n

\"UERGS\"<\/p>\n

\u00a0<\/span>R- B<\/b><\/span><\/span><\/span><\/p>\n

\u00a0<\/span><\/p>\n

<\/a><\/p>\n

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

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

UERGS – 2019 A\u00a0Universidade Estadual do Rio Grande do Sul (UERGS)\u00a0\u00e9 uma\u00a0institui\u00e7\u00e3o de ensino superior\u00a0p\u00fablica e multicampi, com vinte e quatro unidades distribu\u00eddas pelo estado\u00a0brasileiro\u00a0do\u00a0Rio Grande do Sul. Vinculada \u00e0 Secretaria de Ci\u00eancia, Inova\u00e7\u00e3o e Desenvolvimento Tecnol\u00f3gico, a Universidade oferta vinte e dois cursos de\u00a0gradua\u00e7\u00e3o\u00a0(em dados de 2012), tendo cerca de 3926 alunos regularmente matriculados. Com sua\u00a0reitoria\u00a0sediada na cidade de\u00a0Porto<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":4337,"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-4785","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4785","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=4785"}],"version-history":[{"count":3,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4785\/revisions"}],"predecessor-version":[{"id":10344,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4785\/revisions\/10344"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4337"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=4785"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}