{"id":4903,"date":"2020-01-13T02:22:23","date_gmt":"2020-01-13T02:22:23","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=4903"},"modified":"2024-06-30T00:34:22","modified_gmt":"2024-06-30T00:34:22","slug":"ondas-conceitos-e-definicoes-2018-2019","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/vestibulares-recentes\/ondulatoria\/ondas-conceitos-e-definicoes-2018-2019\/","title":{"rendered":"Ondas – Conceitos e Defini\u00e7\u00f5es – 2018\/2019"},"content":{"rendered":"

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

Conceitos e Defini\u00e7\u00f5es<\/b><\/span><\/span><\/span><\/p>\n

01- (<\/b><\/span><\/span><\/span>EsPCEx- AMAN \u2013 SP- RJ \u2013 2018\/19)<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Com\u00a0<\/b><\/span><\/span><\/span>rela\u00e7\u00e3o \u00e0s ondas, s\u00e3o feitas as seguintes afirma\u00e7\u00f5es:<\/b><\/span><\/span><\/span><\/p>\n

I.<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>As\u00a0<\/b><\/span><\/span><\/span>ondas mec\u00e2nicas propagam-se somente em meios materiais.<\/b><\/span><\/span><\/span><\/p>\n

II.<\/b><\/span><\/span><\/span>\u00a0As\u00a0<\/b><\/span><\/span><\/span>ondas eletromagn\u00e9ticas propagam-se somente no v\u00e1cuo.<\/b><\/span><\/span><\/span><\/p>\n

III<\/b><\/span><\/span><\/span>. As\u00a0<\/b><\/span><\/span><\/span>micro-ondas s\u00e3o ondas que se propagam somente em meios materiais.<\/b><\/span><\/span><\/span><\/p>\n

Das\u00a0<\/b><\/span><\/span><\/span>afirma\u00e7\u00f5es acima est\u00e1(\u00e3o) correta(s) apenas a(s)<\/b><\/span><\/span><\/span><\/p>\n

[A]\u00a0<\/b><\/span><\/span><\/span>I.\u00a0<\/b><\/span><\/span><\/span>[B]\u00a0<\/b><\/span><\/span><\/span>II.\u00a0<\/b><\/span><\/span><\/span>[C]\u00a0<\/b><\/span><\/span><\/span>I e III.\u00a0<\/b><\/span><\/span><\/span>[D]\u00a0<\/b><\/span><\/span><\/span>I e II.\u00a0<\/b><\/span><\/span><\/span>[E]\u00a0<\/b><\/span><\/span><\/span>II e III.<\/b><\/span><\/span><\/span><\/p>\n

02-FAMERP 2019 \u2013 Conhecimentos Gerais<\/b><\/span><\/span><\/span><\/p>\n

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A figura representa, na mesma escala, duas ondas sonoras que se propagam no ar.<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Com rela\u00e7\u00e3o a essas ondas,\u00a0<\/b><\/span><\/span><\/span>pode-se afirmar que apresentam<\/b><\/span><\/span><\/span><\/p>\n

(A) o mesmo per\u00edodo e a mesma velocidade de propaga\u00e7\u00e3o.<\/b><\/span><\/span><\/span><\/p>\n

(B) a mesma amplitude e a mesma frequ\u00eancia.<\/b><\/span><\/span><\/span><\/p>\n

(C) o mesmo comprimento de onda e o mesmo per\u00edodo.<\/b><\/span><\/span><\/span><\/p>\n

(D) a mesma frequ\u00eancia e o mesmo comprimento de onda.<\/b><\/span><\/span><\/span><\/p>\n

(E) a mesma velocidade de propaga\u00e7\u00e3o e a mesma amplitude.<\/b><\/span><\/span><\/span><\/p>\n

03- (ESCOLA T\u00c9CNICA ESTADUAL \u2013 ETEC \u2013 SP \u2013 019)<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

O\u00a0<\/b><\/span><\/span><\/span>acidente nuclear de Chernobyl foi respons\u00e1vel por uma serie de modifica\u00e7\u00f5es na biodiversidade<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

local, quando espalhou pela regi\u00e3o grandes quantidades de material radioativo,\u00a0<\/b><\/span><\/span><\/span>cuja\u00a0<\/b><\/span><\/span><\/span>principal emiss\u00e3o consiste em ondas eletromagn\u00e9ticas com os menores comprimentos de onda e, portanto, maiores energias.<\/b><\/span><\/span><\/span><\/p>\n

Uma das\u00a0<\/b><\/span><\/span><\/span>modifica\u00e7\u00f5es da biodiversidade que chamou a aten\u00e7\u00e3o de pesquisadores foi a diminui\u00e7\u00e3o de muitas esp\u00e9cies de insetos.<\/b><\/span><\/span><\/span><\/p>\n

Ha\u00a0<\/b><\/span><\/span><\/span>estudos<\/b><\/span><\/span><\/span>\u00a0sobre\u00a0<\/b><\/span><\/span><\/span>a esteriliza\u00e7\u00e3o de insetos machos do\u00a0<\/b><\/span><\/span><\/span>Aedes aegypti\u00a0<\/b><\/i><\/span><\/span><\/span>na esperan\u00e7a de atacar diretamente esse mosquito.<\/b><\/span><\/span><\/span><\/p>\n

Mosquitos machos s\u00e3o expostos a radia\u00e7\u00f5es semelhantes \u00e0s de Chernobyl, sofrendo modifica\u00e7\u00f5es criticas em seu material gen\u00e9tico, que inibem sua prolifera\u00e7\u00e3o.<\/b><\/span><\/span><\/span><\/p>\n

A\u00a0<\/b><\/span><\/span><\/span>figura apresenta o espectro das ondas eletromagn\u00e9ticas\u00a0<\/b><\/span><\/span><\/span>e logo abaixo\u00a0<\/b><\/span><\/span><\/span>a ordem de grandeza de seus comprimentos de onda em metros.<\/b><\/span><\/span><\/span><\/p>\n

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De acordo com o texto, o tipo de radia\u00e7\u00e3o potencialmente capaz de combater o mosquito citado e<\/b><\/span><\/span><\/span><\/p>\n

(A)\u00a0<\/b><\/span><\/span><\/span>micro-ondas.<\/b><\/span><\/span><\/span><\/p>\n

(B)\u00a0<\/b><\/span><\/span><\/span>infravermelho.<\/b><\/span><\/span><\/span><\/p>\n

(C)\u00a0<\/b><\/span><\/span><\/span>ultravioleta.<\/b><\/span><\/span><\/span><\/p>\n

(D)\u00a0<\/b><\/span><\/span><\/span>raios X.<\/b><\/span><\/span><\/span><\/p>\n

(E)\u00a0<\/b><\/span><\/span><\/span>raios gama.<\/b><\/span><\/span><\/span><\/p>\n

04- (UFT-TO \u2013 019)<\/b><\/span><\/span><\/span><\/p>\n

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A\u00a0<\/b><\/span><\/span><\/span>radia\u00e7\u00e3o s\u00e3o ondas eletromagn\u00e9ticas ou part\u00edculas,\u00a0<\/b><\/span><\/span><\/span>que ao\u00a0<\/b><\/span><\/span><\/span>interagir com a mat\u00e9ria produz efeito sobre ela.\u00a0<\/b><\/span><\/span><\/span>Suas\u00a0<\/b><\/span><\/span><\/span>aplica\u00e7\u00f5es tecnol\u00f3gicas s\u00e3o fundamentais para o desenvolvimento da medicina, da agricultura, da ind\u00fastria e das telecomunica\u00e7\u00f5es.<\/b><\/span><\/span><\/span><\/p>\n

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Com rela\u00e7\u00e3o \u00e0s\u00a0<\/b><\/span><\/span><\/span>radia\u00e7\u00f5es aplicadas em nosso cotidiano, \u00e9 CORRETO afirmar\u00a0<\/b><\/span><\/span><\/span>que:<\/b><\/span><\/span><\/span><\/p>\n

(A)\u00a0<\/b><\/span><\/span><\/span>para a\u00a0<\/b><\/span><\/span><\/span>realiza\u00e7\u00e3o de imagem em tempo real<\/b><\/span><\/span><\/span>\u00a0utiliza-se a\u00a0<\/b><\/span><\/span><\/span>radia\u00e7\u00e3o de ultrassom\u00a0<\/b><\/span><\/span><\/span>que \u00e9\u00a0<\/b><\/span><\/span><\/span>facilmente absorvida pelos tecidos.<\/b><\/span><\/span><\/span><\/p>\n

(B)\u00a0<\/b><\/span><\/span><\/span>os\u00a0<\/b><\/span><\/span><\/span>alimentos quando expostos por muito tempo \u00e0 radia\u00e7\u00e3o de micro-ondas\u00a0<\/b><\/span><\/span><\/span>tornam-se\u00a0<\/b><\/span><\/span><\/span>radioativos,<\/b><\/span><\/span><\/span>\u00a0o que pode ser\u00a0<\/b><\/span><\/span><\/span>prejudicial \u00e0 sa\u00fade.<\/b><\/span><\/span><\/span><\/p>\n

(C)\u00a0<\/b><\/span><\/span><\/span>em um\u00a0<\/b><\/span><\/span><\/span>exame de radiografia, os raios-X atravessam o osso que \u00e9 menos denso que os tecidos ao seu redor, produzindo ent\u00e3o uma imagem na placa.<\/b><\/span><\/span><\/span><\/p>\n

(D)\u00a0<\/b><\/span><\/span><\/span>ao\u00a0<\/b><\/span><\/span><\/span>submeter frutas e legumes a raios gama ocorrer\u00e1 a elimina\u00e7\u00e3o de microrganismos patog\u00eanicos,\u00a0<\/b><\/span><\/span><\/span>como por exemplo, a salmonela,\u00a0<\/b><\/span><\/span><\/span>aumentando sua vida \u00fatil.<\/b><\/span><\/span><\/span><\/p>\n

 <\/p>\n

05- Instituto Federal de Educa\u00e7\u00e3o, Ci\u00eancia e Tecnologia de Pernambuco \u2013 IFPE \u2013 2019<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

<\/p>\n

Uma\u00a0<\/b><\/span><\/span>onda gerada em uma corda oscila\u00a0<\/b><\/span><\/span>com\u00a0<\/b><\/span><\/span>frequ\u00eancia 40 Hz.\u00a0<\/b><\/span><\/span>O\u00a0<\/b><\/span><\/span>gr\u00e1fico mostra a corda em determinado instante.<\/b><\/span><\/span><\/span><\/span><\/p>\n

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Sobre a propaga\u00e7\u00e3o da onda, analise as afirma\u00e7\u00f5es a seguir<\/b><\/span><\/span>.<\/b><\/span><\/span><\/span><\/span><\/p>\n

I.\u00a0<\/b><\/span><\/span>A\u00a0<\/b><\/span><\/span>amplitude de oscila\u00e7\u00e3o da onda \u00e9 10 cm.<\/b><\/span><\/span><\/span><\/span><\/p>\n

II.\u00a0<\/b><\/span><\/span>O\u00a0<\/b><\/span><\/span>comprimento de onda da onda referida \u00e9 80 cm.<\/b><\/span><\/span><\/span><\/span><\/p>\n

III.\u00a0<\/b><\/span><\/span>A\u00a0<\/b><\/span><\/span>velocidade de propaga\u00e7\u00e3o da onda na corda vale 32 m\/s.<\/b><\/span><\/span><\/span><\/span><\/p>\n

IV.<\/b><\/span><\/span>O\u00a0<\/b><\/span><\/span>per\u00edodo de oscila\u00e7\u00e3o da onda \u00e9 40s.<\/b><\/span><\/span><\/span><\/span><\/p>\n

V. Tal propaga\u00e7\u00e3o de onda em uma corda \u00e9 um exemplo de onda eletromagn\u00e9tica.<\/b><\/span><\/span><\/span><\/span><\/p>\n

Assinale a alternativa que classifica CORRETAMENTE as afirma\u00e7\u00f5es\u00a0<\/b><\/span><\/span>quanto\u00a0<\/b><\/span><\/span>a verdadeiras ou falsas\u00a0<\/b><\/span><\/span>na sequ\u00eancia apresentada.<\/b><\/span><\/span><\/span><\/span><\/p>\n

a)\u00a0<\/b><\/span><\/span>V \u2013 F \u2013 F \u2013 V \u2013 V<\/b><\/span><\/span><\/span><\/span><\/p>\n

b)\u00a0<\/b><\/span><\/span>F \u2013 F \u2013 V \u2013 V \u2013 F<\/b><\/span><\/span><\/span><\/span><\/p>\n

c)\u00a0<\/b><\/span><\/span>V \u2013 F \u2013 F \u2013 F \u2013 V<\/b><\/span><\/span><\/span><\/span><\/p>\n

d)\u00a0<\/b><\/span><\/span>V -V \u2013 V \u2013 F \u2013 F<\/b><\/span><\/span><\/span><\/span><\/p>\n

e)\u00a0<\/b><\/span><\/span>F \u2013 V \u2013 V- F \u2013 F<\/b><\/span><\/span><\/span><\/span><\/p>\n

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06- Instituto Federal de Educa\u00e7\u00e3o, Ci\u00eancia e Tecnologia de Mato Grosso\u00a0(IFMT)- 2019.<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

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O\u00a0<\/b><\/span><\/span>s\u00e9culo XIX\u00a0<\/b><\/span><\/span>foi marcado pelo\u00a0<\/b><\/span><\/span>in\u00edcio de uma profunda mudan\u00e7a na forma de enviar e receber informa\u00e7\u00f5es.<\/b><\/span><\/span><\/span><\/span><\/p>\n

Desde 24 de maio de 1844, quando\u00a0<\/b><\/span><\/span>Samuel Finley Bresse Morse\u00a0<\/b><\/span><\/span>enviou sua famosa mensagem \u201cEis que Deus criou\u201d, com o\u00a0<\/b><\/span><\/span>rec\u00e9m-inventado tel\u00e9grafo,<\/b><\/span><\/span>\u00a0a\u00a0<\/b><\/span><\/span>humanidade<\/b><\/span><\/span>\u00a0p\u00f4de ver\u00a0<\/b><\/span><\/span>pela primeira vez a<\/b><\/span><\/span><\/span><\/span><\/p>\n

<\/p>\n

transmiss\u00e3o instant\u00e2nea de uma informa\u00e7\u00e3o em pontos afastados por grandes dist\u00e2ncias.<\/b><\/span><\/span><\/span><\/span><\/p>\n

A\u00a0<\/b><\/span><\/span>partir de ent\u00e3o<\/b><\/span><\/span>, diversos\u00a0<\/b><\/span><\/span>instrumentos foram criados para facilitar a comunica\u00e7\u00e3o na Terra, provocando profundas mudan\u00e7as nas rela\u00e7\u00f5es sociais, comerciais e de trabalho<\/b><\/span><\/span>.<\/b><\/span><\/span><\/span><\/span><\/p>\n

Essas\u00a0<\/b><\/span><\/span>mudan\u00e7as, sem d\u00favidas, s\u00f3 foram poss\u00edveis a partir do entendimento pelo homem do comportamento das ondas eletromagn\u00e9ticas.<\/b><\/span><\/span>\u00a0Com rela\u00e7\u00e3o\u00a0<\/b><\/span><\/span>\u00e0s ondas eletromagn\u00e9ticas, pode-se afirmar que:<\/b><\/span><\/span><\/span><\/span><\/p>\n

(A)\u00a0<\/b><\/span><\/span>s\u00e3o ondas que se propagam com campo el\u00e9trico constante.<\/b><\/span><\/span><\/span><\/span><\/p>\n

(B)\u00a0<\/b><\/span><\/span>s\u00e3o ondas que se propagam em dois campos vari\u00e1veis, intimamente ligados, sendo um el\u00e9trico e outro magn\u00e9tico.<\/b><\/span><\/span><\/span><\/span><\/p>\n

(C)\u00a0<\/b><\/span><\/span>s\u00e3o ondas que viajam no v\u00e1cuo com velocidade sempre menor do que a velocidade da luz.<\/b><\/span><\/span><\/span><\/span><\/p>\n

(D)\u00a0<\/b><\/span><\/span>s\u00e3o ondas que necessitam de um meio material para se propagarem e transportarem energia cin\u00e9tica e potencial.<\/b><\/span><\/span><\/span><\/span><\/p>\n

(E)\u00a0<\/b><\/span><\/span>s\u00e3o ondas longitudinais que se propagam no v\u00e1cuo com velocidade de 3,0 x 10 8 m\/s.<\/b><\/span><\/span><\/span><\/span><\/p>\n

 <\/p>\n

07- (INSPER \u2013 SP \u2013 018)<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

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<\/p>\n

08- UFG EaD \u2013 GO \u2013 2017\/2<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

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As radia\u00e7\u00f5es eletromagn\u00e9ticas ou ondas eletromagn\u00e9ticas s\u00e3o muito utilizadas em nosso dia a dia: das ondas de r\u00e1dio, para transportar sinais de TV e telefonia, a ondas de raios-X, para visualizar estruturas internas do corpo humano. Essas radia\u00e7\u00f5es transportam energia, cuja quantidade est\u00e1 diretamente relacionada com sua frequ\u00eancia. Quanto maior a frequ\u00eancia, mais energia aonde transporta.<\/b><\/span><\/span><\/span><\/span><\/p>\n

<\/p>\n

No quadro a seguir, s\u00e3o\u00a0<\/b><\/span><\/span>apresentadas algumas faixas aproximadas de frequ\u00eancias e os nomes que damos a essas regi\u00f5es.<\/b><\/span><\/span><\/span><\/span><\/p>\n

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A faixa de frequ\u00eancia em que conseguimos observar a onda eletromagn\u00e9tica a olho nu \u00e9 chamada de regi\u00e3o do vis\u00edvel. Considerando as faixas de frequ\u00eancias apresentadas no quadro acima,\u00a0<\/b><\/span><\/span>a frequ\u00eancia, em Hz, que certamente se encontra na faixa do vis\u00edvel \u00e9<\/b><\/span><\/span><\/span><\/span><\/p>\n

(A) 4 x 109<\/b><\/span><\/span><\/span><\/span><\/p>\n

(B) 5 x 1012<\/b><\/span><\/span><\/span><\/span><\/p>\n

(C) 6 x 1014<\/b><\/span><\/span><\/span><\/span><\/p>\n

(D) 7 x 1017<\/b><\/span><\/span><\/span><\/span><\/p>\n

 <\/p>\n

Equa\u00e7\u00e3o da onda<\/a><\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

09- (UECE-CE-018)<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

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<\/p>\n

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 <\/p>\n

10- (Faculdade de Tecnologia Termomec\u00e2nica \u2013 SP- 018)\u00a0<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

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comprimentos de onda nesses dois meios\u00a0<\/b><\/span><\/span>\u00e9 igual a<\/b><\/span><\/span><\/span><\/span><\/p>\n

<\/p>\n

11- (PUC-RJ\/018)<\/b><\/span><\/span><\/span><\/p>\n

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 <\/p>\n

12- (FAMERP-SP-018)<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

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A\u00a0<\/b><\/span><\/span>tabela\u00a0<\/b><\/span><\/span>mostra a\u00a0<\/b><\/span><\/span>classifica\u00e7\u00e3o das ondas eletromagn\u00e9ticas\u00a0<\/b><\/span><\/span>em\u00a0<\/b><\/span><\/span>fun\u00e7\u00e3o das suas frequ\u00eancias.<\/b><\/span><\/span><\/span><\/span><\/p>\n

<\/p>\n

Considere\u00a0<\/b><\/span><\/span>que as\u00a0<\/b><\/span><\/span>ondas eletromagn\u00e9ticas\u00a0<\/b><\/span><\/span>se\u00a0<\/b><\/span><\/span>propagam pelo ar\u00a0<\/b><\/span><\/span>com\u00a0<\/b><\/span><\/span>velocidade 3,0.108\u00a0m\/s\u00a0<\/b><\/span><\/span>aproximadamente e que\u00a0<\/b><\/span><\/span>um radar emite ondas eletromagn\u00e9ticas de comprimento 2,0 cm.<\/b><\/span><\/span><\/span><\/span><\/p>\n

As\u00a0<\/b><\/span><\/span>ondas emitidas\u00a0<\/b><\/span><\/span>por\u00a0<\/b><\/span><\/span>esse radar\u00a0<\/b><\/span><\/span>s\u00e3o<\/b><\/span><\/span><\/span><\/span><\/p>\n

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13- (UERR-RR-019)<\/b><\/span><\/span><\/span><\/p>\n

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A\u00a0<\/b><\/span><\/span><\/span>frequ\u00eancia de uma onda (f) est\u00e1 relacionada com sua velocidade (V) e o comprimento de onda (\u03bb)<\/b><\/span><\/span><\/span><\/p>\n

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atrav\u00e9s da express\u00e3o: f = V\/\u03bb .\u00a0<\/b><\/span><\/span><\/span>Com\u00a0<\/b><\/span><\/span><\/span>esta informa\u00e7\u00e3o devemos inferir que a velocidade da onda:<\/b><\/span><\/span><\/span><\/p>\n

A)\u00a0<\/b><\/span><\/span><\/span>depende s\u00f3 da frequ\u00eancia da mesma.<\/b><\/span><\/span><\/span><\/p>\n

B)\u00a0<\/b><\/span><\/span><\/span>n\u00e3o depende da frequ\u00eancia nem do comprimento de onda.<\/b><\/span><\/span><\/span><\/p>\n

C)\u00a0<\/b><\/span><\/span><\/span>depende da frequ\u00eancia e do comprimento de onda.<\/b><\/span><\/span><\/span><\/p>\n

D)\u00a0<\/b><\/span><\/span><\/span>depende s\u00f3 do comprimento de onda.<\/b><\/span><\/span><\/span><\/p>\n

E)\u00a0<\/b><\/span><\/span><\/span>\u00e9 constante em qualquer meio.<\/b><\/span><\/span><\/span><\/p>\n

Reflex\u00e3o e refra\u00e7\u00e3o de ondas<\/b><\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n

14- Instituto Federal de Educa\u00e7\u00e3o, Ci\u00eancia e Tecnologia do Norte de Minas Gerais\u00a0(IFNMG)- 2019<\/b><\/span><\/span><\/span><\/p>\n

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Um\u00a0<\/b><\/span><\/span><\/span>modelo te\u00f3rico para se estudar o fen\u00f4meno de refra\u00e7\u00e3o,\u00a0<\/b><\/span><\/span><\/span>proposto por\u00a0<\/b><\/span><\/span><\/span>Huygens, no final do s\u00e9culo XVII, est\u00e1 esquematizado na figura abaixo:<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Quanto \u00e0\u00a0<\/b><\/span><\/span><\/span>proposi\u00e7\u00e3o de Huygens, \u00e9 correto afirmar que:<\/b><\/span><\/span><\/span><\/p>\n

A)\u00a0<\/b><\/span><\/span><\/span>para um dado par de meios, esse modelo prev\u00ea que a raz\u00e3o entre os senos dos \u00e2ngulos de incid\u00eancia e de refra\u00e7\u00e3o \u00e9 constante.<\/b><\/span><\/span><\/span><\/p>\n

B)\u00a0<\/b><\/span><\/span><\/span>tal modelo fundamenta-se na concep\u00e7\u00e3o corpuscular para a natureza da luz, ou seja, na hip\u00f3tese de que a luz \u00e9 formada de part\u00edculas.<\/b><\/span><\/span><\/span><\/p>\n

C)\u00a0<\/b><\/span><\/span><\/span>o comprimento de onda da luz, nos fen\u00f4menos refrativos, \u00e9 diretamente proporcional ao \u00edndice de refra\u00e7\u00e3o do meio em que ela se propaga.<\/b><\/span><\/span><\/span><\/p>\n

D)\u00a0<\/b><\/span><\/span><\/span>esse modelo somente se aplica \u00e0 refra\u00e7\u00e3o de vibra\u00e7\u00f5es longitudinais, em meios materiais e para pequenos comprimentos de onda.<\/b><\/span><\/span><\/span><\/p>\n

15- Universidade Federal de Uberl\u00e2ndia\u00a0\u2013\u00a0UFU\u00a0\u2013 MG \u2013 meio do ano \u2013 2019\/2020<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

O\u00a0<\/b><\/span><\/span><\/span>morcego \u00e9 um animal que possui um sistema de orienta\u00e7\u00e3o por meio da emiss\u00e3o de ondas sonoras.<\/b><\/span><\/span><\/span><\/p>\n

\"Ondas\"<\/p>\n

Quando esse animal emite um som e recebe o eco 0,3 segundos ap\u00f3s, significa que o obst\u00e1culo est\u00e1 a que dist\u00e2ncia dele?<\/b><\/span><\/span><\/span>\u00a0(Considere a\u00a0<\/b><\/span><\/span><\/span>velocidade do som no ar de 340m\/s<\/b><\/span><\/span><\/span>).<\/b><\/span><\/span><\/span><\/p>\n

A)\u00a0<\/b><\/span><\/span><\/span>102m.\u00a0<\/b><\/span><\/span><\/span>B)\u00a0<\/b><\/span><\/span><\/span>51m.\u00a0<\/b><\/span><\/span><\/span>C)\u00a0<\/b><\/span><\/span><\/span>340m.\u00a0<\/b><\/span><\/span><\/span>D)\u00a0<\/b><\/span><\/span><\/span>1.133m<\/b><\/span><\/span><\/span><\/p>\n

Confira a resolu\u00e7\u00e3o comentada<\/a><\/h3>\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":"

Ondas Conceitos e Defini\u00e7\u00f5es 01- (EsPCEx- AMAN \u2013 SP- RJ \u2013 2018\/19) Com\u00a0rela\u00e7\u00e3o \u00e0s ondas, s\u00e3o feitas as seguintes afirma\u00e7\u00f5es: I.\u00a0As\u00a0ondas mec\u00e2nicas propagam-se somente em meios materiais. II.\u00a0As\u00a0ondas eletromagn\u00e9ticas propagam-se somente no v\u00e1cuo. III. As\u00a0micro-ondas s\u00e3o ondas que se propagam somente em meios materiais. Das\u00a0afirma\u00e7\u00f5es acima est\u00e1(\u00e3o) correta(s) apenas a(s) [A]\u00a0I.\u00a0[B]\u00a0II.\u00a0[C]\u00a0I e III.\u00a0[D]\u00a0I e II.\u00a0[E]\u00a0II e III. 02-FAMERP 2019 \u2013<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3368,"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-4903","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4903","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=4903"}],"version-history":[{"count":4,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4903\/revisions"}],"predecessor-version":[{"id":9926,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4903\/revisions\/9926"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3368"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=4903"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}