Q321
Open questionWhich of the following are electromagnetic waves?
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Physics GK · all questionsSounds waves and Motion
Sounds waves and Motion
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Q322
Open questionWhat is the approximate speed of sound in distilled water at 25°C (77°F)?
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Q323
Open questionIf T is the time period of an oscillating pendulum, then which one of the following statement is not correct?
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Q324
Open questionThe time period of a sound wave is 0.01 seconds. Find its frequency (in Hz).
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Q325
Open questionHow much should minimum distance be between the source of sound and reflecting surface, so that an echo can be heard clearly?
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Q326
Open questionWhich of the following statements are true/false about the speed of sound in different mediums at 25°C?
A. In seawater, the speed of sound is 1531 km/s.
B. In water (distilled), the speed of sound is 1498 km/s.
A. In seawater, the speed of sound is 1531 km/s.
B. In water (distilled), the speed of sound is 1498 km/s.
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Q327
Open questionWhich type of sound waves can propagate in solids?
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Q328
Open questionSound wave in air is
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Q329
Open questionWhen a stone is dropped on the surface of still water, the waves produced are
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Q330
Open questionIf the frequency of a sound wave is 50 hertz, find its time period.
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Q331
Open questionAn echo comes back in 3 seconds. If the speed of sound is 342 ms-1, what is the distance from the source to the reflecting surface?
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Q332
Open questionSound cannot pass through
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Q333
Open questionWhen the speed of an object exceeds to the speed of sound, it is said to travel at . . . . . . . . speed.
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Q334
Open questionWhich one of the following statements is not correct?
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Q335
Open questionThe sound wave travels at a speed of 339 m/s-1. If its wavelength is 1.5 cm, what will be the frequency of the wave?
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Q336
Open questionA person rings, a metallic bell near a strong concrete wall. He hears the echo after 0.3 s. If the sound moves with a speed of 340 m/s, how far is the wall from him?
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Q337
Open questionSONAR is based on the principle of
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Q338
Open questionThe frequency (in Hz) of a note that is one octave higher than 500 Hz is
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Q339
Open questionWhich of the following is an example of simple harmonic motion?
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Q340
Open questionIf Va, Vw and Vs respectively are the speed of sound in air, water and steel, then
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