questões de vestibulares
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pergunta:(Fuvest)Um navio parado em águas profundas é atingido por uma crista de onda (elevação máxima) a cada T segundos. A seguir o navio é posto em movimento, na direção e no sentido de propagação das ondas e com a mesma velocidade delas. Nota-se, então, (veja a figura adiante) que ao longo do comprimento L do navio cabem exatamente 3 cristas. Qual é a velocidade do navio?

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a) L/3 T
b) L/2 T
c) L/T
d) 2 L/T
e) 3 L/T
resposta:[B]
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