{"id":28,"date":"2014-11-14T21:06:22","date_gmt":"2014-11-14T21:06:22","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=28"},"modified":"2024-09-02T17:14:12","modified_gmt":"2024-09-02T17:14:12","slug":"exercicios-do-vestibular-da-unicentro","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/universidades-2015\/exercicios-do-vestibular-da-unicentro\/","title":{"rendered":"Exerc\u00edcios do Vestibular da UNICENTRO"},"content":{"rendered":"

\"\"<\/p>\n

A\u00a0Universidade Estadual do Centro-Oeste\u00a0(UNICENTRO) \u00e9 uma institui\u00e7\u00e3o p\u00fablica de ensino superior mantida pelo governo do estado do\u00a0Paran\u00e1, com sede na cidade de Guarapuava, onde possui dois campi: Santa Cruz e Cedeteg. Possui campus na cidade de Irati\u00a0e campi avan\u00e7ados nas cidades de\u00a0Chopinzinho,\u00a0Laranjeiras do Sul,\u00a0Pitanga\u00a0e Prudent\u00f3polis. Sua regi\u00e3o de abrang\u00eancia \u00e9 de 50 munic\u00edpios totalizando aproximadamente 1 milh\u00e3o de habitantes.<\/b><\/span><\/span><\/span><\/p>\n

O Inep (Instituto Nacional de Estudos e Pesquisas Educacionais An\u00edsio Teixeira), vinculado ao Minist\u00e9rio da Educa\u00e7\u00e3o, divulgou nova vers\u00e3o dos IGC (\u00d6ndices Gerais de Cursos das Institui\u00e7\u00f5es), para todas as universidades, centros universit\u00e1rios e faculdades do Pa\u00eds. Pela tabela, tornada p\u00fablica ontem (31\/08), a Unicentro (Universidade Estadual do Centro-Oeste) aparece em 13. lugar, em um universo 157 institui\u00e7\u00f5es paranaenses. O IGC \u00e9 um indicador de qualidade da educa\u00e7\u00e3o superior que considera, em sua composi\u00e7\u00e3o, a qualidade dos cursos de gradua\u00e7\u00e3o e de p\u00f3s-gradua\u00e7\u00e3o (mestrado e doutorado). O resultado final \u00e9 expresso em valores cont\u00ednuos (que v\u00e3o de 0 a 500) e em faixas (de 1 a 5).<\/b><\/span><\/span><\/span><\/p>\n

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

\"\"<\/p>\n

Ap\u00f3s receber uma <\/b><\/span><\/span><\/span>manuten\u00e7\u00e3o eletr\u00f4nica equivocada<\/b><\/span><\/span><\/span>, um <\/b><\/span><\/span><\/span>radar m\u00f3vel de tr\u00e2nsito<\/b><\/span><\/span><\/span> passa a operar<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

aferindoas velocidades de ve\u00edculos sob a <\/b><\/span><\/span><\/span>unidade de mm\/min (mil\u00edmetros por minuto)<\/b><\/span><\/span>.<\/b><\/span><\/span><\/span>Sabendo do problema,o fiscal que opera o aparelho <\/b><\/span><\/span><\/span>converte adequadamente a <\/b><\/span><\/span><\/span>velocidade regulamentar de uma avenida de60 km\/h para a nova unidade.<\/b><\/span><\/span><\/p>\n

Assinale a <\/b><\/span><\/span><\/span>alternativa <\/b><\/span><\/span><\/span>que apresenta, <\/b><\/span><\/span><\/span>corretamente, o valor resultante da convers\u00e3o<\/b><\/span><\/span><\/span> encontrado pelofiscal.<\/b><\/span><\/span><\/span><\/p>\n

a) 10<\/b><\/span><\/span><\/span><\/span>3<\/b><\/span><\/span><\/span><\/sup><\/span> mm\/min b) 10<\/b><\/span><\/span><\/span><\/span>4<\/b><\/span><\/span><\/span><\/sup><\/span> mm\/min c) 10<\/b><\/span><\/span><\/span><\/span>5<\/b><\/span><\/span><\/span><\/sup><\/span> mm\/min d) 10<\/b><\/span><\/span><\/span><\/span>6<\/b><\/span><\/span><\/span><\/sup><\/span> mm\/min e) 10<\/b><\/span><\/span><\/span><\/span>7<\/b><\/span><\/span><\/span><\/sup><\/span> mm\/min<\/b><\/span><\/span><\/span><\/span><\/p>\n

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

\"\"<\/p>\n

Considere os <\/b><\/span><\/span><\/span>vetores de for\u00e7a<\/b><\/span><\/span><\/span> representados no plano cartesiano a seguir.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

A <\/b><\/span><\/span><\/span>soma vetorial<\/b><\/span><\/span><\/span> dos quatro vetores <\/b><\/span><\/span><\/span>resultar\u00e1 em um vetor<\/b><\/span><\/span><\/span><\/p>\n

a) unit\u00e1rio, negativo, na dire\u00e7\u00e3o de x.<\/b><\/span><\/span><\/span><\/p>\n

b) unit\u00e1rio, negativo, na dire\u00e7\u00e3o de y.<\/b><\/span><\/span><\/span><\/p>\n

c) unit\u00e1rio, positivo, na dire\u00e7\u00e3o de x.<\/b><\/span><\/span><\/span><\/p>\n

d) unit\u00e1rio, positivo, na dire\u00e7\u00e3o de y.<\/b><\/span><\/span><\/p>\n

e) nulo, portanto desprovido de dire\u00e7\u00e3o e sentido<\/b><\/span><\/span><\/p>\n

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

\"\"<\/p>\n

Um <\/b><\/span><\/span>ve\u00edculo<\/b><\/span><\/span><\/span> descreve o seu <\/b><\/span><\/span>movimento conforme o gr\u00e1fico a seguir.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Com <\/b><\/span><\/span><\/span>base nas informa\u00e7\u00f5es do gr\u00e1fico<\/b><\/span><\/span><\/span>, assinale a <\/b><\/span><\/span><\/span>alternativa correta.<\/b><\/span><\/span><\/span><\/p>\n

a) A velocidade m\u00e9dia em B \u00e9 maior que a velocidade m\u00e9dia em D.<\/b><\/span><\/span><\/span><\/p>\n

b) No trecho A, a velocidade m\u00e9dia do ve\u00edculo \u00e9 maior que a velocidade m\u00e9dia em D.<\/b><\/span><\/span><\/span><\/p>\n

c) No trecho B, a velocidade m\u00e9dia do ve\u00edculo \u00e9 maior que zero.<\/b><\/span><\/span><\/span><\/p>\n

d) No trecho D, a velocidade m\u00e9dia do ve\u00edculo \u00e9 o dobro que a velocidade m\u00e9dia em C.<\/b><\/span><\/span><\/span><\/p>\n

e) O m\u00f3dulo das velocidades m\u00e9dias em A e em C s\u00e3o iguais.<\/b><\/span><\/span><\/p>\n

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

\"\"<\/p>\n

Um <\/b><\/span><\/span><\/span>oscilador harm\u00f4nico simples<\/b><\/span><\/span><\/span>, composto por <\/b><\/span><\/span><\/span>mola e massa<\/b><\/span><\/span><\/span>, apresenta uma <\/b><\/span><\/span><\/span>amplitude de<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

movimentode 5 cm e pulsa\u00e7\u00e3o de 2<\/b><\/span><\/span><\/span>\u03c0<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

Considerando que <\/b><\/span><\/span><\/span>n\u00e3o h\u00e1 defasagem na oscila\u00e7\u00e3o do sistema<\/b><\/span><\/span><\/span>, assinale a alternativa que apresenta, <\/b><\/span><\/span><\/span>corretamente,a elonga\u00e7\u00e3o do movimento no instante t <\/b><\/span><\/span><\/span>= <\/b><\/span><\/span><\/span>2,5 s.<\/b><\/span><\/span><\/span><\/p>\n

a) -10 cm b) -5 cm c) <\/b><\/span><\/span><\/span>–<\/b><\/span><\/span><\/span>0 cm d) <\/b><\/span><\/span><\/span>–<\/b><\/span><\/span><\/span>5 cm e) 10 cm<\/b><\/span><\/span><\/span><\/p>\n

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

\"\"<\/p>\n

Com base no <\/b><\/span><\/span><\/span>teorema de Varignon<\/b><\/span><\/span><\/span> para a mec\u00e2nica, assinale a <\/b><\/span><\/span><\/span>alternativa que apresenta<\/b><\/span><\/span><\/span>, <\/b><\/span><\/span><\/span>corretamente<\/b><\/span><\/span><\/span>, o<\/b><\/span><\/span><\/span>momento resultante sobre um sistema de for\u00e7as concorrentes.<\/b><\/span><\/span><\/span><\/p>\n

a) A m\u00e9dia dos momentos das for\u00e7as aplicadas.<\/b><\/span><\/span><\/span><\/p>\n

b) A subtra\u00e7\u00e3o dos momentos das for\u00e7as aplicadas.<\/b><\/span><\/span><\/span><\/p>\n

c) A soma dos momentos das for\u00e7as aplicadas.<\/b><\/span><\/span><\/span><\/p>\n

d) A divis\u00e3o dos momentos das for\u00e7as aplicadas.<\/b><\/span><\/span><\/span><\/p>\n

e) A multiplica\u00e7\u00e3o dos momentos das for\u00e7as aplicadas.<\/b><\/span><\/span><\/span><\/p>\n

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

\"\"<\/p>\n

Ao <\/b><\/span><\/span><\/span>chutar uma bola<\/b><\/span><\/span><\/span>, um jogador de futebol aplica a ela uma <\/b><\/span><\/span><\/span>for\u00e7a de 7<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>N<\/b><\/span><\/span><\/span> durante um <\/b><\/span><\/span><\/span>intervalo de<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

tempo igual a 2<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>-1<\/b><\/span><\/span><\/sup><\/span>s.<\/b><\/span><\/span><\/span><\/p>\n

Assinale a <\/b><\/span><\/span><\/span>alternativa <\/b><\/span><\/span><\/span>que apresenta, <\/b><\/span><\/span><\/span>corretamente, o <\/b><\/span><\/span><\/span>impulso<\/b><\/span><\/span><\/span> aplicado \u00e0 bola.<\/b><\/span><\/span><\/span><\/p>\n

a) 140 Ns b) 280 Ns c) 1350 N\/s d) 3500 N\/s e) 2.10<\/b><\/span><\/span><\/span>-5<\/b><\/span><\/span><\/sup><\/span>s\/N<\/b><\/span><\/span><\/span><\/p>\n

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

\"\"<\/p>\n

Um <\/b><\/span><\/span><\/span>cubo maci\u00e7o de <\/b><\/span><\/span><\/span>aresta <\/b><\/span><\/span><\/span>R<\/b><\/span><\/span><\/span>flutua<\/b><\/span><\/span><\/span> na \u00e1gua com <\/b><\/span><\/span><\/span>exatamente<\/b><\/span><\/span><\/span>3\/5 <\/b><\/span><\/span><\/span>de sua altura submersa<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Considerando que a <\/b><\/span><\/span><\/span>densidade da \u00e1gua equivale a <\/b><\/span><\/span><\/span>\u03c1 = 1,0.10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span>kg\/m<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span>, assinale a <\/b><\/span><\/span><\/span>alternativa<\/b><\/span><\/span><\/span> que apresenta,<\/b><\/span><\/span><\/span>corretamente, a <\/b><\/span><\/span><\/span>densidade<\/b><\/span><\/span><\/span> do bloco.<\/b><\/span><\/span><\/span><\/p>\n

a) 0<\/b><\/span><\/span><\/span>,<\/b><\/span><\/span><\/span>1.10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> kg\/m<\/b><\/span><\/span><\/span>3 <\/b><\/span><\/span><\/sup><\/span>b) 0<\/b><\/span><\/span><\/span>,<\/b><\/span><\/span><\/span>3.10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span>kg\/m<\/b><\/span><\/span><\/span>3 <\/b><\/span><\/span><\/sup><\/span>c) 0<\/b><\/span><\/span><\/span>,<\/b><\/span><\/span><\/span>6.10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span>kg\/m<\/b><\/span><\/span><\/span>3 <\/b><\/span><\/span><\/sup><\/span>d) 0<\/b><\/span><\/span><\/span>,<\/b><\/span><\/span><\/span>9.10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> kg\/m<\/b><\/span><\/span><\/span>3 <\/b><\/span><\/span><\/sup><\/span>e) 1<\/b><\/span><\/span><\/span>,<\/b><\/span><\/span><\/span>0.10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span>kg\/m<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span><\/p>\n

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

\"\"<\/p>\n

A <\/b><\/span><\/span>figura<\/b><\/span><\/span><\/span>a seguir representa <\/b><\/span><\/span>duas ondas <\/b><\/span><\/span><\/span>que se <\/b><\/span><\/span>propagam em cordas distintas<\/b><\/span><\/span><\/span>, por\u00e9m com a <\/b><\/span><\/span>mesma<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

densidade linear.<\/b><\/span><\/span><\/span><\/p>\n

Considerando que as <\/b><\/span><\/span>ondas s\u00e3o emitidas de forma constante<\/b><\/span><\/span><\/span>, assinale a <\/b><\/span><\/span>alternativa correta<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/p>\n

a) A amplitude da Onda 1 \u00e9 o dobro da amplitude da Onda 2.<\/b><\/span><\/span><\/p>\n

b) A amplitude da Onda 2 \u00e9 o dobro da amplitude da Onda 1.<\/b><\/span><\/span><\/p>\n

c) A frequ\u00eancia de oscila\u00e7\u00e3o da Onda 2 \u00e9 igual \u00e0 frequ\u00eancia de oscila\u00e7\u00e3o da Onda 1.<\/b><\/span><\/span><\/p>\n

d) O comprimento de onda da Onda 1 \u00e9 o dobro do comprimento de onda da Onda 2.<\/b><\/span><\/span><\/p>\n

e) O comprimento de onda da Onda 2 \u00e9 o dobro do comprimento de onda da Onda 1.<\/b><\/span><\/span><\/p>\n

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

\"\"<\/p>\n

A figura <\/b><\/span><\/span>a seguir <\/b><\/span><\/span><\/span>representa o <\/b><\/span><\/span>experimento realizado por Joule <\/b><\/span><\/span><\/span>em meados do s\u00e9culo XIX.<\/b><\/span><\/span><\/p>\n

\"\"<\/p>\n

Desconsiderando qualquer perda de energia para o meio<\/b><\/span><\/span><\/span>, assinale a alternativa que apresenta, <\/b><\/span><\/span>corretamente,a ordem em que as convers\u00f5es de energia ocorrem.<\/b><\/span><\/span><\/span><\/p>\n

a) De energia cin\u00e9tica para energia potencial gravitacional; de energia potencial gravitacional para energia t\u00e9rmica.<\/b><\/span><\/span><\/p>\n

b) De energia cin\u00e9tica para energia t\u00e9rmica; de energia t\u00e9rmica para energia potencial gravitacional.<\/b><\/span><\/span><\/p>\n

c) De energia potencial gravitacional para energia cin\u00e9tica; de energia cin\u00e9tica para energia t\u00e9rmica.<\/b><\/span><\/span><\/p>\n

d) De energia potencial gravitacional para energia t\u00e9rmica; de energia t\u00e9rmica para energia cin\u00e9tica.<\/b><\/span><\/span><\/p>\n

e) De energia t\u00e9rmica para energia potencial gravitacional; de energia potencial gravitacional para energia cin\u00e9tica.<\/b><\/span><\/span><\/p>\n

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

\"\"<\/p>\n

A <\/b><\/span><\/span><\/span>fibra \u00f3ptica <\/b><\/span><\/span><\/span>\u00e9 um dispositivo \u00f3ptico de extrema import\u00e2ncia na atualidade, utilizado em segmentos<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

como o de <\/b><\/span><\/span><\/span>telecomunica\u00e7\u00f5es<\/b><\/span><\/span><\/span>, o de <\/b><\/span><\/span><\/span>transporte<\/b><\/span><\/span><\/span> e o <\/b><\/span><\/span><\/span>hospitalar<\/b><\/span><\/span><\/span>. \u00c9 composta, basicamente, por um <\/b><\/span><\/span><\/span>cilindrointerno transparente<\/b><\/span><\/span><\/span>, envolto por uma <\/b><\/span><\/span><\/span>casca transparente<\/b><\/span><\/span><\/span>. Sobre o cilindro e o seu envolt\u00f3rio \u00e9 aplicadauma <\/b><\/span><\/span><\/span>capa protetora<\/b><\/span><\/span><\/span>, geralmente de <\/b><\/span><\/span><\/span>material pl\u00e1stico, com o objetivo de proteger o dispositivo.<\/b><\/span><\/span><\/span><\/p>\n

Em rela\u00e7\u00e3o \u00e0 <\/b><\/span><\/span><\/span>f\u00edsica envolvida na fibra \u00f3ptica, assinale a <\/b><\/span><\/span><\/span>alternativa correta.<\/b><\/span><\/span><\/span><\/p>\n

a) O alto \u00edndice de refra\u00e7\u00e3o da casca envolvente propicia o efeito da difra\u00e7\u00e3o total e consequente transmiss\u00e3o dasinforma\u00e7\u00f5es.<\/b><\/span><\/span><\/span><\/p>\n

b) O \u00edndice de refra\u00e7\u00e3o do cilindro interno pode ser desprez\u00edvel, desde que a difra\u00e7\u00e3o total da luz garanta atransmiss\u00e3o das informa\u00e7\u00f5es.<\/b><\/span><\/span><\/span><\/p>\n

c) O \u00edndice de refra\u00e7\u00e3o da casca envolvente \u00e9 igual ou maior que o do cilindro interno.<\/b><\/span><\/span><\/span><\/p>\n

d) O \u00edndice de refra\u00e7\u00e3o do cilindro interno deve ser menor que o da casca envolvente, proporcionando melhorpropaga\u00e7\u00e3o da luz.<\/b><\/span><\/span><\/span><\/p>\n

e) O cilindro interno transparente possui \u00edndice de refra\u00e7\u00e3o maior que o da casca envolvente.<\/b><\/span><\/span><\/span><\/p>\n

11-(UNICENTRO-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

A <\/b><\/span><\/span><\/span>figura a seguir <\/b><\/span><\/span><\/span>representa tr\u00eas esferas com <\/b><\/span><\/span><\/span>carga el\u00e9trica Q<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span>, Q<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span> <\/b>e Q<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sub><\/span>, alinhadas e fixadas a uma<\/b><\/span><\/span><\/span><\/p>\n

dist\u00e2ncia <\/b><\/span><\/span><\/span>d<\/b><\/span><\/span><\/span> <\/b>entre elas.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Nesse <\/b><\/span><\/span><\/span>posicionamento,<\/b><\/span><\/span><\/span> as <\/b><\/span><\/span><\/span>tr\u00eas esferas encontram-se em <\/b><\/span><\/span><\/span>equil\u00edbrio<\/b><\/span><\/span><\/span> devido \u00e0 a\u00e7\u00e3o das for\u00e7as el\u00e9tricas.<\/b><\/span><\/span><\/span><\/p>\n

Para que o arranjo <\/b><\/span><\/span><\/span>continue em equil\u00edbrio<\/b><\/span><\/span><\/span>, \u00e9 <\/b><\/span><\/span><\/span>necess\u00e1rio que as esferas possuam cargas<\/b><\/span><\/span><\/span><\/p>\n

a) Q<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub> = negativa, Q<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub> = negativa e Q<\/b><\/span><\/span>3<\/b><\/span><\/span><\/sub> = negativa. <\/b><\/span><\/span>b) Q<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span> = negativa, Q<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span> = positiva e Q<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sub><\/span> = negativa.<\/b><\/span><\/span><\/span><\/p>\n

c) Q<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span> = positiva, Q<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span> = negativa e Q<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sub><\/span> = negativa. d) Q<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span> = positiva, Q<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span> = positiva e Q<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sub><\/span> = negativa.<\/b><\/span><\/span><\/span><\/p>\n

e) Q<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub> = positiva, Q<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub> = positiva e Q<\/b><\/span><\/span>3<\/b><\/span><\/span><\/sub> = positiva.<\/b><\/span><\/span><\/p>\n

12-(UNICENTRO-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Uma <\/b><\/span><\/span>frente de onda se propaga, da esquerda para a direita<\/b><\/span><\/span><\/span>, na <\/b><\/span><\/span>superf\u00edcie da \u00e1gua<\/b><\/span><\/span><\/span> e encontra uma <\/b><\/span><\/span>barreira com um pequeno orif\u00edcio.<\/b><\/span><\/span><\/span> Ao se <\/b><\/span><\/span>deparar com o obst\u00e1culo<\/b><\/span><\/span><\/span>, ocorre o fen\u00f4meno conhecido como <\/b><\/span><\/span>difra\u00e7\u00e3o,<\/b><\/span><\/span><\/span>ou seja, ela <\/b><\/span><\/span>contorna esse anteparo <\/b><\/span><\/span><\/span>colocado em seu caminho.<\/b><\/span><\/span><\/p>\n

Assinale a <\/b><\/span><\/span>alternativa<\/b><\/span><\/span><\/span> que representa, <\/b><\/span><\/span>corretamente, a difra\u00e7\u00e3o sofrida pela onda.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

13-(UNICENTRO-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

A <\/b><\/span><\/span><\/span>figura a seguir<\/b><\/span><\/span><\/span> representa um <\/b><\/span><\/span><\/span>circuito composto por tr\u00eas resistores e uma bateria.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Considerando que os <\/b><\/span><\/span><\/span>resistores t\u00eam a <\/b><\/span><\/span><\/span>mesma resist\u00eancia<\/b><\/span><\/span><\/span> e que a bateria fornece uma <\/b><\/span><\/span><\/span>diferen\u00e7a de potencial constante ao circuito, assinale a alternativa correta.<\/b><\/span><\/span><\/span><\/p>\n

a) A corrente el\u00e9trica que percorre o resistor R<\/b><\/span><\/span><\/span>1 <\/b><\/span><\/span><\/sub><\/span>\u00e9 igual \u00e0 que percorre o resistor R<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

b) A corrente el\u00e9trica que percorre o resistor R<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span> \u00e9 igual \u00e0 que percorre o resistor R<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sub><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

c) A corrente el\u00e9trica que percorre o resistor R<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sub><\/span> \u00e9 igual \u00e0 que percorre o resistor R<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

d) A corrente el\u00e9trica que percorre o resistor R<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sub><\/span> \u00e9 maior que a corrente que percorre o resistor R<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

e) A corrente el\u00e9trica que percorre o resistor R<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sub><\/span> \u00e9 maior que a corrente que percorre o resistor R<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

Se eles possuem a mesma resist\u00eancia el\u00e9trica1414 <\/b><\/span><\/span><\/span><\/p>\n

14-(UNICENTRO-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Considerando a <\/b><\/span><\/span><\/span>associa\u00e7\u00e3o de capacitores em s\u00e9rie e em paralelo<\/b><\/span><\/span><\/span>, assinale a <\/b><\/span><\/span><\/span>alternativa correta.<\/b><\/span><\/span><\/span><\/p>\n

a) Ligados em s\u00e9rie, a capacit\u00e2ncia equivalente \u00e9 igual \u00e0 soma das capacit\u00e2ncias de cada capacitor.<\/b><\/span><\/span><\/span><\/p>\n

b) Ligados em s\u00e9rie, a carga acumulada pelo capacitor equivalente \u00e9 igual \u00e0 soma das cargas de cada capacitor.<\/b><\/span><\/span><\/span><\/p>\n

c) Ligados em paralelo, a carga do capacitor equivalente \u00e9 igual \u00e0 carga de cada um dos capacitores associados.<\/b><\/span><\/span><\/span><\/p>\n

d) Ligados em paralelo, a carga total acumulada pela associa\u00e7\u00e3o \u00e9 igual \u00e0 soma das cargas de cada capacitor.<\/b><\/span><\/span><\/span><\/p>\n

e) Ligados em paralelo, a ddp total da associa\u00e7\u00e3o \u00e9 igual \u00e0 soma das ddp parciais.<\/b><\/span><\/span><\/p>\n

15-(UNICENTRO-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Um <\/b><\/span><\/span>condutor retil\u00edneo<\/b><\/span><\/span><\/span>, pelo qual percorre uma <\/b><\/span><\/span>corrente el\u00e9trica cont\u00ednua e constante<\/b><\/span><\/span><\/span>, est\u00e1 imerso em uma regi\u00e3o com <\/b><\/span><\/span>campo magn\u00e9tico uniforme\"\".<\/b><\/span><\/span><\/span><\/p>\n

Assinale a <\/b><\/span><\/span>alternativa que corresponde, <\/b><\/span><\/span><\/span>corretamente<\/b><\/span><\/span><\/span>, \u00e0 figura que representa a a\u00e7\u00e3o da <\/b><\/span><\/span><\/span>for\u00e7a magn\u00e9tica sobre o condutor nessa configura\u00e7\u00e3o.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

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

A\u00a0Universidade Estadual do Centro-Oeste\u00a0(UNICENTRO) \u00e9 uma institui\u00e7\u00e3o p\u00fablica de ensino superior mantida pelo governo do estado do\u00a0Paran\u00e1, com sede na cidade de Guarapuava, onde possui dois campi: Santa Cruz e Cedeteg. Possui campus na cidade de Irati\u00a0e campi avan\u00e7ados nas cidades de\u00a0Chopinzinho,\u00a0Laranjeiras do Sul,\u00a0Pitanga\u00a0e Prudent\u00f3polis. Sua regi\u00e3o de abrang\u00eancia \u00e9 de 50 munic\u00edpios totalizando aproximadamente 1 milh\u00e3o de habitantes. O<\/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-28","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/28","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=28"}],"version-history":[{"count":2,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/28\/revisions"}],"predecessor-version":[{"id":33,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/28\/revisions\/33"}],"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=28"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}