{"id":4698,"date":"2019-08-05T02:02:16","date_gmt":"2019-08-05T02:02:16","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=4698"},"modified":"2024-07-11T02:58:20","modified_gmt":"2024-07-11T02:58:20","slug":"termomecanica-2019-2o-semestre","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/universidades-2019\/termomecanica-2019-2o-semestre\/","title":{"rendered":"Termomec\u00e2nica 2019 – 2o Semestre"},"content":{"rendered":"

Termomec\u00e2nica \u2013 2019 \u2013 2<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sup><\/span> semestre<\/b><\/span><\/span><\/span><\/p>\n

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Faculdade de Tecnologia Termomecanica<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

Na Faculdade de Tecnologia Termomecanica, o aluno recebe gratuitamente um curso que corresponde a um investimento financeiro anual por aluno de quase R$ 25 mil. Al\u00e9m do modelo de educa\u00e7\u00e3o inovador e gratuito, que inclui forma\u00e7\u00e3o humanista, todos os universit\u00e1rios recebem gratuitamente uniformes e alimenta\u00e7\u00e3o balanceada. A FTT ainda possui\u00a0parceria com mais de 130 empresas nacionais e multinacionais e 11 agentes de integra\u00e7\u00e3o de est\u00e1gio. Em 12 anos, a institui\u00e7\u00e3o j\u00e1\u00a0preparou quase 1,3 mil profissionais\u00a0para o mercado de trabalho e\u00a0conquistou \u00edndice de 86,7% de empregabilidade.<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

A grade curricular dos quatro cursos superiores oferecidos pela Faculdade de Tecnologia Termomecanica \u2013 Administra\u00e7\u00e3o, Engenharia de Alimentos, Engenharia de Computa\u00e7\u00e3o e Engenharia de Controle e Automa\u00e7\u00e3o \u2013 possui tamb\u00e9m aulas de empreendedorismo, libras, recupera\u00e7\u00e3o e nivelamento. Al\u00e9m disso, cursos de extens\u00e3o s\u00e3o oferecidos gratuitamente aos alunos.<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

A Faculdade de Tecnologia Termomec\u00e2nica est\u00e1 localizada no Centro Educacional da Funda\u00e7\u00e3o Salvador Arena, no munic\u00edpio de S\u00e3o Bernardo do Campo, na Grande S\u00e3o Paulo. O complexo educacional de 131 mil m\u00b2 recebeu\u00a0investimentos de mais de R$ 350 milh\u00f5es\u00a0em educa\u00e7\u00e3o nos \u00faltimos 15 anos e, al\u00e9m de laborat\u00f3rios com equipamentos de \u00faltima gera\u00e7\u00e3o, possui gin\u00e1sios e quadras poliesportivos, conjunto aqu\u00e1tico, est\u00e1dio ol\u00edmpico, uma rede de bibliotecas interativas e um dos teatros mais modernos do Brasil, com capacidade para 600 pessoas.<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

Em nota divulgada em 17 de novembro de 2016, pelo Minist\u00e9rio da Educa\u00e7\u00e3o, a Faculdade de Tecnologia Termomec\u00e2nica obteve\u00a0nota quatro no IGC\u00a0\u2013 \u00cdndice Geral de Cursos. O IGC \u00e9 uma das medidas usadas pelo Inep para avaliar as institui\u00e7\u00f5es de educa\u00e7\u00e3o superior, p\u00fablicas e privadas, classificando-as com notas de um a cinco.<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

De acordo com esse levantamento, a Faculdade de Tecnologia Termomecanica ocupa o 1\u00ba lugar entre as institui\u00e7\u00f5es de ensino superior das tr\u00eas principais cidades do ABC, a 7\u00aa no Estado de S\u00e3o Paulo e a 33\u00aa, entre todas as faculdades do Brasil. A coloca\u00e7\u00e3o \u00e9 um orgulho para uma faculdade que iniciou suas atividades h\u00e1 menos de uma d\u00e9cada e que se equipara a institui\u00e7\u00f5es j\u00e1 consagradas de nosso Pa\u00eds.<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

01 \u2013 (Faculdade de Tecnologia Termomec\u00e2nica \u2013 SP- 019)<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

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Observe <\/b><\/span><\/span>a figura, onde se destaca uma placa de fiscaliza\u00e7\u00e3o eletr\u00f4nica de velocidade.<\/b><\/span><\/span><\/span><\/span><\/p>\n

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No <\/b><\/span><\/span>Sistema Internacional de Unidades, <\/b><\/span><\/span>os <\/b><\/span><\/span>valores indicados na placa est\u00e3o compreendidos no intervalo de<\/b><\/span><\/span> <\/b><\/span><\/span><\/p>\n

(A) <\/b><\/span><\/span>15 m\/s a 25 m\/s. <\/b><\/span><\/span><\/span><\/span><\/p>\n

(B) <\/b><\/span><\/span>18 m\/s a 22 m\/s. <\/b><\/span><\/span><\/span><\/span><\/p>\n

(C) <\/b><\/span><\/span>10 m\/s a 20 m\/s. <\/b><\/span><\/span><\/span><\/span><\/p>\n

(D) <\/b><\/span><\/span>18 m\/s a 32 m\/s. <\/b><\/span><\/span><\/span><\/span><\/p>\n

(E) <\/b><\/span><\/span>20 m\/s a 50 m\/s. <\/b><\/span><\/span><\/span><\/span><\/p>\n

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02 \u2013 (Faculdade de Tecnologia Termomec\u00e2nica \u2013 SP- 019)<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

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O <\/b><\/span><\/span>gr\u00e1fico representa a varia\u00e7\u00e3o da velocidade escalar de um m\u00f3vel em fun\u00e7\u00e3o do tempo,<\/b><\/span><\/span> sendo <\/b><\/span><\/span>t<\/b><\/span><\/span>1<\/b><\/span><\/sub><\/span> o instante em que a reta intercepta o eixo do tempo. <\/b><\/span><\/span><\/span><\/span><\/p>\n

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A <\/b><\/span><\/span>alternativa que representa corretamente o gr\u00e1fico da acelera\u00e7\u00e3o escalar desse m\u00f3vel, <\/b><\/span><\/span>tamb\u00e9m <\/b><\/span><\/span>em fun\u00e7\u00e3o do tempo, <\/b><\/span><\/span>\u00e9:<\/b><\/span><\/span><\/span><\/span><\/p>\n

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03 \u2013 (Faculdade de Tecnologia Termomec\u00e2nica \u2013 SP- 019)<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

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A <\/b><\/span><\/span><\/span>ilustra\u00e7\u00e3o mostra dois blocos, A, de 40 kg, e B, de 20 kg, estando A apoiado sobre um plano inclinado sem atrito, enquanto B est\u00e1 pendurado numa corda ideal que interliga os dois blocos. <\/b><\/span><\/span><\/span><\/p>\n

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(A) <\/b><\/span><\/span><\/span>os dois blocos se manter\u00e3o em repouso. <\/b><\/span><\/span><\/span><\/p>\n

(B) <\/b><\/span><\/span><\/span>o bloco A subir\u00e1 sobre o plano inclinado com acelera\u00e7\u00e3o 2 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> . <\/b><\/span><\/span><\/span><\/p>\n

(C) <\/b><\/span><\/span><\/span>o bloco A descer\u00e1 sobre o plano inclinado com acelera\u00e7\u00e3o 2 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> . <\/b><\/span><\/span><\/span><\/p>\n

(D) <\/b><\/span><\/span><\/span>o bloco B descer\u00e1 com velocidade constante igual a 2 m\/s. <\/b><\/span><\/span><\/span><\/p>\n

(E) <\/b><\/span><\/span><\/span>o bloco B subir\u00e1 com velocidade constante igual a 2 m\/s<\/b><\/span><\/span><\/span><\/p>\n

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04 \u2013 (Faculdade de Tecnologia Termomec\u00e2nica \u2013 SP- 019)<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

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Considere o <\/b><\/span><\/span><\/span>patinador da figura lan\u00e7ando-se horizontalmente sobre uma superf\u00edcie de gelo sem atrito, inicialmente a 40 metros de altitude e com velocidade 20 m\/s, <\/b><\/span><\/span><\/span>como mostra a <\/b><\/span><\/span><\/span>figura.<\/b><\/span><\/span><\/span><\/p>\n

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A <\/b><\/span><\/span><\/span>acelera\u00e7\u00e3o da gravidade \u00e9 igual a 10 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> <\/b>e <\/b><\/span><\/span><\/span>n\u00e3o h\u00e1 dissipa\u00e7\u00e3o de energia mec\u00e2nica<\/b><\/span><\/span><\/span> em todo o movimento do patinador, <\/b><\/span><\/span><\/span>considerado como um ponto material.<\/b><\/span><\/span><\/span> Sabendo que <\/b><\/span><\/span><\/span>ele atinge o declive a 15 metros de altitude, a alternativa que indica corretamente sua velocidade, nesse instante, <\/b><\/span><\/span><\/span>\u00e9 <\/b><\/span><\/span><\/span><\/p>\n

(A) <\/b><\/span><\/span><\/span>25 m\/s. <\/b><\/span><\/span><\/span>(B) <\/b><\/span><\/span><\/span>30 m\/s. <\/b><\/span><\/span><\/span>(C) <\/b><\/span><\/span><\/span>35 m\/s. <\/b><\/span><\/span><\/span>(D) <\/b><\/span><\/span><\/span>40 m\/s. <\/b><\/span><\/span><\/span>(E) <\/b><\/span><\/span><\/span>45 m\/s.<\/b><\/span><\/span><\/span><\/p>\n

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05 \u2013 (Faculdade de Tecnologia Termomec\u00e2nica \u2013 SP- 019)<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

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Com o <\/b><\/span><\/span><\/span>prop\u00f3sito de medir a temperatura de um forno, <\/b><\/span><\/span><\/span>um <\/b><\/span><\/span><\/span>fragmento de ferro \u00e9 inserido em seu interior,<\/b><\/span><\/span><\/span> sendo <\/b><\/span><\/span><\/span>a\u00ed deixado um tempo suficiente para que entre em equil\u00edbrio t\u00e9rmico com o forno. <\/b><\/span><\/span><\/span><\/p>\n

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Num <\/b><\/span><\/span><\/span>dado momento, o fragmento \u00e9 retirado do forno <\/b><\/span><\/span><\/span>e <\/b><\/span><\/span><\/span>rapidamente jogado dentro de um calor\u00edmetro ideal, contendo \u00e1gua inicialmente a 20 \u00baC <\/b><\/span><\/span><\/span>e com <\/b><\/span><\/span><\/span>uma massa igual \u00e0 do fragmento de ferro.<\/b><\/span><\/span><\/span> O <\/b><\/span><\/span><\/span>calor espec\u00edfico do ferro \u00e9 0,12 cal\/(g.\u00baC<\/b><\/span><\/span><\/span>) e da <\/b><\/span><\/span><\/span>\u00e1gua \u00e9 1,0 cal\/(g.\u00baC). <\/b><\/span><\/span><\/span><\/p>\n

Ap\u00f3s certo tempo, verifica-se que a temperatura de equil\u00edbrio t\u00e9rmico entre o ferro e a \u00e1gua \u00e9 igual a 80 \u00baC. <\/b><\/span><\/span><\/span><\/p>\n

Sabendo que <\/b><\/span><\/span><\/span>durante a passagem do forno para o calor\u00edmetro n\u00e3o houve varia\u00e7\u00e3o de temperatura no fragmento de ferro e que a troca de calor ocorreu apenas entre o ferro e a \u00e1gua, <\/b><\/span><\/span><\/span>a <\/b><\/span><\/span><\/span>alternativa que indica corretamente a temperatura do forno <\/b><\/span><\/span><\/span>\u00e9: <\/b><\/span><\/span><\/span><\/p>\n

(A) <\/b><\/span><\/span><\/span>320 \u00baC. <\/b><\/span><\/span><\/span>(B) <\/b><\/span><\/span><\/span>410 \u00baC. <\/b><\/span><\/span><\/span>(C) <\/b><\/span><\/span><\/span>460 \u00baC. <\/b><\/span><\/span><\/span>(D) <\/b><\/span><\/span><\/span>540 \u00baC. <\/b><\/span><\/span><\/span>(E) <\/b><\/span><\/span><\/span>580 \u00baC<\/b><\/span><\/span><\/span><\/p>\n

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06 \u2013 (Faculdade de Tecnologia Termomec\u00e2nica \u2013 SP- 019)<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

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A <\/b><\/span><\/span><\/span>figura mostra os primeiros quatro modos de vibra\u00e7\u00e3o de uma corda em regime estacion\u00e1rio e com os dois extremos fixos, onde V \u00e9 o ventre, e N, o n\u00f3 da onda. <\/b><\/span><\/span><\/span><\/p>\n

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Sendo <\/b><\/span><\/span><\/span>L a dist\u00e2ncia entre os dois extremos fixos no modo fundamental, <\/b><\/span><\/span><\/span>o <\/b><\/span><\/span><\/span>comprimento de onda no d\u00e9cimo harm\u00f4nico<\/b><\/span><\/span><\/span> ser\u00e1 de <\/b><\/span><\/span><\/span><\/p>\n

A) <\/b><\/span><\/span><\/span>0,1 L. <\/b><\/span><\/span><\/span>(B) <\/b><\/span><\/span><\/span>0,2 L. <\/b><\/span><\/span><\/span>(C) <\/b><\/span><\/span><\/span>0,3 L. <\/b><\/span><\/span><\/span>(D) <\/b><\/span><\/span><\/span>0,4 L. <\/b><\/span><\/span><\/span>(E) <\/b><\/span><\/span><\/span>0,5 L.<\/b><\/span><\/span><\/span><\/p>\n

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

07 \u2013 (Faculdade de Tecnologia Termomec\u00e2nica \u2013 SP- 019)<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

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A <\/b><\/span><\/span><\/span>figura mostra um circuito el\u00e9trico<\/b><\/span><\/span><\/span> formado por <\/b><\/span><\/span><\/span>duas malhas, havendo um gerador el\u00e9trico em cada uma.<\/b><\/span><\/span><\/span><\/p>\n

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Sabendo que <\/b><\/span><\/span><\/span>as setas indicam os sentidos reais das correntes el\u00e9tricas nestes ramos, <\/b><\/span><\/span><\/span>a <\/b><\/span><\/span><\/span>alternativa que apresenta os valores corretos de I, R e U, respectivamente, <\/b><\/span><\/span><\/span>\u00e9 <\/b><\/span><\/span><\/span><\/p>\n

(A) <\/b><\/span><\/span><\/span>5 A ; 1,0 \u03a9 ; 12 V. <\/b><\/span><\/span><\/span><\/p>\n

(B) <\/b><\/span><\/span><\/span>5 A ; 1,2 \u03a9 ; 14 V. <\/b><\/span><\/span><\/span><\/p>\n

(C) <\/b><\/span><\/span><\/span>8 A ; 1,0 \u03a9 ; 10 V. <\/b><\/span><\/span><\/span><\/p>\n

(D) <\/b><\/span><\/span><\/span>8 A ; 0,5 \u03a9 ; 22 V. <\/b><\/span><\/span><\/span><\/p>\n

(E) <\/b><\/span><\/span><\/span>10 A ; 5 \u03a9 ; 9 V<\/b><\/span><\/span><\/span><\/p>\n

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

08 \u2013 (Faculdade de Tecnologia Termomec\u00e2nica \u2013 SP- 019)<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

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Considere <\/b><\/span><\/span><\/span>um corpo esf\u00e9rico, <\/b><\/span><\/span><\/span>constitu\u00eddo de <\/b><\/span><\/span><\/span>casca e caro\u00e7o, ambos homog\u00eaneos e de mesmo volume, mas feitos com materiais diferentes,<\/b><\/span><\/span><\/span> como <\/b><\/span><\/span><\/span>mostra a figura.<\/b><\/span><\/span><\/span><\/p>\n

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Verifica-se que, <\/b><\/span><\/span><\/span>quando colocado na superf\u00edcie da \u00e1gua, o corpo flutua com 60% de seu volume total submerso. <\/b><\/span><\/span><\/span>Sendo a <\/b><\/span><\/span><\/span>densidade absoluta da \u00e1gua igual a 1,0 kg\/L, <\/b><\/span><\/span><\/span>e a <\/b><\/span><\/span><\/span>densidade absoluta do material que constitui a casca igual a 0,4 kg\/L,<\/b><\/span><\/span><\/span> a <\/b><\/span><\/span><\/span>alternativa que indica corretamente a densidade absoluta do material que constitui o caro\u00e7o<\/b><\/span><\/span><\/span> \u00e9 <\/b><\/span><\/span><\/span><\/p>\n

(A) 0,4 kg\/L. (B) 0,6 kg\/L. (C) 0,8 kg\/L. (D) 1,0 kg\/L. (E) 1,2 kg\/L.<\/b><\/span><\/span><\/span><\/p>\n

Resolu\u00e7\u00e3o comentada das quest\u00f5es de F\u00edsica da <\/span><\/span><\/span>Faculdade de Tecnologia Termomec\u00e2nica \u2013 SP- 019<\/span><\/span><\/span><\/p>\n

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

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Em m\/s<\/b><\/span><\/span> 60\/3,<\/b><\/span><\/span>6 = 16,66 m\/s <\/b><\/span><\/span> 80\/3,6 <\/b><\/span><\/span>= 22,22 m\/s <\/b><\/span><\/span> veja na alternativa A que <\/b><\/span><\/span>15 m\/s<\/b><\/span><\/span>x3,6 <\/b><\/span><\/span>= 54 km\/h<\/b><\/span><\/span> e que <\/b><\/span><\/span>25 m\/s<\/b><\/span><\/span>x3,6 <\/b><\/span><\/span>= 90 km\/h, <\/b><\/span><\/span>ou seja, <\/b><\/span><\/span>60 km\/h e 90 km\/h est\u00e3o compreendidos entre 54 km\/h e 90 km\/h.<\/b><\/span><\/span><\/span><\/span><\/p>\n

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

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

Resumo dos gr\u00e1ficos do espa\u00e7o, velocidade e acelera\u00e7\u00e3o do MUV, com a > 0 e com<\/b><\/span><\/span><\/span><\/span><\/p>\n

a < 0.<\/b><\/span><\/span><\/span><\/span><\/p>\n

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

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

For\u00e7as que agem sobre cada bloco <\/b><\/span><\/span><\/span> <\/b>peso de B <\/b><\/span><\/span><\/span> <\/b>P<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span> = m<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span>.g <\/b><\/span><\/span><\/span>= 20.10 <\/b><\/span><\/span><\/span>= 200 N.<\/b><\/span><\/span><\/span><\/p>\n

Parcela do peso de A respons\u00e1vel pela tend\u00eancia de descida de A,<\/b><\/span><\/span><\/span> paralela \u00e0 superf\u00edcie do plano inclinado <\/b><\/span><\/span><\/span>P<\/b><\/span><\/span><\/span>pA<\/b><\/span><\/span><\/sub><\/span> = m<\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/sub><\/span>.g.sen30<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sup><\/span> <\/b>= 400.10.1\/2 <\/b><\/span><\/span><\/span>= 200 N.<\/b><\/span><\/span><\/span><\/p>\n

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tamb\u00e9m de T = 200 N,<\/b><\/span><\/span><\/span> sendo a <\/b><\/span><\/span><\/span>for\u00e7a resultante sobre cada bloco nula<\/b><\/span><\/span><\/span> e o <\/b><\/span><\/span><\/span>sistema permanecer\u00e1 em repouso.<\/b><\/span><\/span><\/span><\/p>\n

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

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

Colocando a origem das alturas no ponto Q <\/b><\/span><\/span><\/span>e calculando a <\/b><\/span><\/span><\/span>energia mec\u00e2nica do corpo de massa m nos pontos P e Q:<\/b><\/span><\/span><\/span><\/p>\n

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

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

Equa\u00e7\u00e3o fundamental da calorimetria (calor sens\u00edvel ou calor espec\u00edfico)<\/b><\/span><\/span><\/span><\/p>\n

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Princ\u00edpio da Conserva\u00e7\u00e3o da energia<\/b><\/span><\/span><\/span><\/p>\n

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A teoria acima \u00e9\u00a0<\/b><\/span><\/span><\/span>v\u00e1lida para mais de um corpo<\/b><\/span><\/span><\/span>\u00a0e, como a quantidade de calor\u00a0<\/b><\/span><\/span><\/span>recebida \u00e9 positiva e a cedida \u00e9 negativa, tem-se que\u00a0\u00a0\u00a0 Q1\u00a0+ Q2\u00a0+ Q3\u00a0+ \u2026. + QN\u00a0\u00a0= 0 \u00a0ou \u00a0<\/b><\/span><\/span><\/span>m1.c1.(\u03b8e\u00a0\u2013 \u03b81) + m2.c2.( \u03b8e\u00a0\u2013 \u03b82) + m3.c3.( \u03b8e\u00a0\u2013 \u03b83) + \u2026\u00a0<\/b><\/span><\/span><\/span><\/span>+ mN.cN.(<\/b><\/span><\/span><\/span>\u00a0\u03b8e\u00a0\u2013 \u03b8N<\/b><\/span><\/span><\/span><\/span>) = 0.<\/b><\/span><\/span><\/span><\/p>\n

Enunciado desse princ\u00edpio das trocas de calor:<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Seja <\/b><\/span><\/span><\/span>t<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span> a temperatura inicial do peda\u00e7o de ferro dentro do for<\/b><\/span><\/span><\/span>no e no <\/b><\/span><\/span><\/span>in\u00edcio da troca de calor com a \u00e1gua do calor\u00edmetro <\/b><\/span><\/span><\/span>e, <\/b><\/span><\/span><\/span>pelo enunciado m<\/b><\/span><\/span><\/span>\u00e1gua<\/b><\/span><\/span><\/sub><\/span> = m<\/b><\/span><\/span><\/span>ferro<\/b><\/span><\/span><\/sub><\/span> = m com t<\/b><\/span><\/span><\/span>equil\u00edbrio<\/b><\/span><\/span><\/sub><\/span> = 80 <\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sup><\/span>C e t<\/b><\/span><\/span><\/span>o\u00e1gua<\/b><\/span><\/span><\/sub><\/span> = 20 <\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sup><\/span>C.<\/b><\/span><\/span><\/span><\/p>\n

Quantidade de calor recebido pela massa m de \u00e1gua Q<\/b><\/span><\/span><\/span>\u00e1gua<\/b><\/span><\/span><\/sub><\/span> = m.c<\/b><\/span><\/span><\/span>\u00e1gua<\/b><\/span><\/span><\/sub><\/span> (t<\/b><\/span><\/span><\/span>equil\u00edbrio <\/b><\/span><\/span><\/sub><\/span>– t<\/b><\/span><\/span><\/span>o\u00e1gua<\/b><\/span><\/span><\/sub><\/span>) = m.1.(80 \u2013 20)<\/b><\/span><\/span><\/span> <\/b><\/span><\/span> <\/b>Q<\/b><\/span><\/span><\/span>\u00e1gua<\/b><\/span><\/span><\/sub><\/span> = 60m.<\/b><\/span><\/span><\/span><\/p>\n

Quantidade de calor cedido pela massa m ferro Q<\/b><\/span><\/span><\/span>ferro<\/b><\/span><\/span><\/sub><\/span> = m.c<\/b><\/span><\/span><\/span>ferro<\/b><\/span><\/span><\/sub><\/span> (t<\/b><\/span><\/span><\/span>equil\u00edbrio <\/b><\/span><\/span><\/sub><\/span>– t<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>) <\/b><\/span><\/span><\/span>= m.0,12.(80 \u2013 t<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>) <\/b><\/span><\/span><\/span><\/p>\n

Q<\/b><\/span><\/span><\/span>ferro<\/b><\/span><\/span><\/sub><\/span> = 9,6m \u2013 0,12mt<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

Q<\/b><\/span><\/span><\/span>\u00e1gua <\/b><\/span><\/span><\/sub><\/span>+ Q<\/b><\/span><\/span><\/span>ferr<\/b><\/span><\/span><\/sub><\/span> = 0 <\/b><\/span><\/span><\/span>60m + 9,6m \u2013 0,12mt<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span> = 0 t<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span> = 69,6m\/0,12m <\/b><\/span><\/span><\/span>t<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span> = 580 <\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sup><\/span>C.<\/b><\/span><\/span><\/span><\/p>\n

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

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

<\/p>\n

<\/p>\n

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

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

Primeira lei de Kirchhoff ou lei dos n\u00f3s:<\/b><\/span><\/span><\/span> \u201cA\u00a0<\/b><\/span><\/span><\/span>soma alg\u00e9brica\u00a0<\/b><\/span><\/span><\/span>das\u00a0<\/b><\/span><\/span><\/span>correntes que chegam a um n\u00f3\u00a0<\/b><\/span><\/span><\/span>\u00e9 igual \u00e0\u00a0<\/b><\/span><\/span><\/span>soma alg\u00e9brica das correntes que saem do mesmo n\u00f3\u201d.<\/b><\/span><\/span><\/span><\/p>\n

Exemplo num\u00e9rico\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>\u00a0 determine a\u00a0<\/b><\/span><\/span><\/span>intensidade da corrente i3\u00a0do trecho de circuito abaixo:<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

\u00a0<\/span>Segunda lei de Kirchhoff ou lei das malhas:<\/b><\/span><\/span><\/span> \u201c<\/b><\/span><\/span><\/span>Percorrendo uma malha num mesmo sentido<\/b><\/span><\/span><\/span>,\u00a0<\/b><\/span><\/span><\/span>\u00e9 nula a soma alg\u00e9brica das tens\u00f5es encontradas em cada elemento do circuito\u201d<\/b><\/span><\/span><\/span><\/p>\n

Baseado na\u00a0<\/b><\/span><\/span><\/span>lei acima, escolhendo um sentido de percurso para cada malha<\/b><\/span><\/span><\/span>,\u00a0<\/b><\/span><\/span><\/span>partindo de um ponto, retornando ao mesmo ponto e igualando esta soma alg\u00e9brica de tens\u00f5es a zero, voc\u00ea pode estabelecer as seguintes conven\u00e7\u00f5es:<\/b><\/span><\/span><\/span><\/p>\n

\u00a0<\/span>Conven\u00e7\u00e3o para o sinal de E:<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

\u00a0<\/span>Conven\u00e7\u00e3o para o sinal de R.i<\/b><\/span><\/span><\/span><\/p>\n

Quando o\u00a0<\/b><\/span><\/span><\/span>sentido da corrente i coincidir com o sentido do percurso escolhido para a malha,<\/b><\/span><\/span><\/span>\u00a0o\u00a0<\/b><\/span><\/span><\/span>sinal de R.i ser\u00e1 positivo e quando o sentido da corrente i n\u00e3o coincidir com o sentido de percurso escolhido para a malha, o sinal R.i ser\u00e1 negativo.<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Observe no <\/b><\/span><\/span><\/span>ponto A que a corrente que chega i \u00e9 a soma das correntes que saem,<\/b><\/span><\/span><\/span> ou seja<\/b><\/span><\/span><\/span>, <\/b><\/span><\/span>i<\/b><\/span><\/span><\/span> <\/b>= 2 + 6 <\/b><\/span><\/span><\/span>=<\/b><\/span><\/span><\/span> <\/b>8 A.<\/b><\/span><\/span><\/span><\/p>\n

Percorrendo a malha I no sentido hor\u00e1rio a partir de A, retornando a A e igualando a zero <\/b><\/span><\/span><\/span> – 8R \u2013 0,5.2 + 5 = 0 8R = 4 <\/b><\/span><\/span><\/span>R = 0,5 \u2126. <\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Percorrendo a malha II no sentido hor\u00e1rio a partir de A, retornando a A e igualando a zero <\/b><\/span><\/span><\/span>+ 6.3 \u2013U + 0,5.8 = 0 <\/b><\/span><\/span><\/span>U = 22 V.<\/b><\/span><\/span><\/span><\/p>\n

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

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

\"Termomec\u00e2nica\"<\/p>\n

V<\/b><\/span><\/span><\/span>casca <\/b><\/span><\/span><\/sub><\/span> = V<\/b><\/span><\/span><\/span>caro\u00e7o<\/b><\/span><\/span><\/sub><\/span> = V <\/b><\/span><\/span><\/span><\/p>\n

d<\/b><\/span><\/span><\/span>casca<\/b><\/span><\/span><\/sub><\/span> = m<\/b><\/span><\/span><\/span>casca<\/b><\/span><\/span><\/sub><\/span>\/V <\/b><\/span><\/span><\/span> 0,4 = m<\/b><\/span><\/span><\/span>casca<\/b><\/span><\/span><\/sub><\/span>\/V <\/b><\/span><\/span><\/span>m<\/b><\/span><\/span><\/span>casca<\/b><\/span><\/span><\/sub><\/span> = 0,4V<\/b><\/span><\/span><\/span><\/p>\n

d<\/b><\/span><\/span><\/span>caro\u00e7o<\/b><\/span><\/span><\/sub><\/span> = m<\/b><\/span><\/span><\/span>caro\u00e7o<\/b><\/span><\/span><\/sub><\/span>\/V <\/b><\/span><\/span><\/span> d<\/b><\/span><\/span><\/span>caro\u00e7o<\/b><\/span><\/span><\/sub><\/span> = m<\/b><\/span><\/span><\/span>caro\u00e7o<\/b><\/span><\/span><\/sub><\/span>\/V <\/b><\/span><\/span><\/span>m<\/b><\/span><\/span><\/span>caro\u00e7o<\/b><\/span><\/span><\/sub><\/span> = d<\/b><\/span><\/span><\/span>caro\u00e7o<\/b><\/span><\/span><\/sub><\/span>.V<\/b><\/span><\/span><\/span><\/p>\n

d<\/b><\/span><\/span><\/span>corpo<\/b><\/span><\/span><\/sub><\/span> = m<\/b><\/span><\/span><\/span>corpo<\/b><\/span><\/span><\/sub><\/span>\/V<\/b><\/span><\/span><\/span>corpo<\/b><\/span><\/span><\/sub><\/span> <\/b><\/span><\/span><\/span> d<\/b><\/span><\/span><\/span>corpo<\/b><\/span><\/span><\/sub><\/span> = (m<\/b><\/span><\/span><\/span>casca<\/b><\/span><\/span><\/sub><\/span> + m<\/b><\/span><\/span><\/span>caro\u00e7o<\/b><\/span><\/span><\/sub><\/span>)\/2V d<\/b><\/span><\/span><\/span>corpo <\/b><\/span><\/span><\/sub><\/span>= (0,4V + d<\/b><\/span><\/span><\/span>caro\u00e7o<\/b><\/span><\/span><\/sub><\/span>.V)\/2V<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

R- C<\/b><\/span><\/span><\/span><\/p>\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":"

Termomec\u00e2nica \u2013 2019 \u2013 2o semestre Faculdade de Tecnologia Termomecanica Na Faculdade de Tecnologia Termomecanica, o aluno recebe gratuitamente um curso que corresponde a um investimento financeiro anual por aluno de quase R$ 25 mil. Al\u00e9m do modelo de educa\u00e7\u00e3o inovador e gratuito, que inclui forma\u00e7\u00e3o humanista, todos os universit\u00e1rios recebem gratuitamente uniformes e alimenta\u00e7\u00e3o balanceada. A FTT ainda possui\u00a0parceria<\/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-4698","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4698","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=4698"}],"version-history":[{"count":3,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4698\/revisions"}],"predecessor-version":[{"id":10267,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4698\/revisions\/10267"}],"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=4698"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}