
Velocidade do Som (5 questões)
Authored by Dario Vaz
Physics
8th Grade
Used 22+ times

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5 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Qual destes valores poderá corresponder à velocidade do som na água?
340 m/s
1450 m/s
5020 m/s
O som não se propaga na água
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Sabendo que o som de uma buzina percorreu 5000 m em 15 segundos, indica a velocidade do som nesse caso.
333 m/s
340 m/s
366 m/s
75000 m/s
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Calcula a distância que o som percorre no ar (v = 340 m/s) em 1 minuto (60s).
5,6 km
20,4 km
176,4 km
25000 km
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Um morcego emite um ultrassom que "bate" numa parede e volta para trás, demorando 0,02 s nesse trajeto de ida e volta. Diz-se que o som sofre _____________, sendo a distância do morcego à parede _________.
...reflexão... 6,8 m.
...reflexão... 3,4 m.
...refração... 6,8 m.
...refração... 3,4 m.
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Um barco de pesca encontra-se numa água onde o som se propaga com uma velocidade de 1400 m/s. Com recurso a um sonar detetou um cardume a 832 m de profundidade, numa zona do oceano cuja profundidade atinge os 3,7 km. Calcula o tempo que o som demorou a percorrer a distância entre o barco e o cardume.
0,6 s
1,2 s
1,7 s
3,4 s
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