A man is watching two trains, one leavin...

A man is watching two trains, one leaving and the other coming in with equal speeds of `4 m//s`. If they sound their whistles, each of frequency 240 Hz, the number of beats heard by the man (velocity of sound in air = `320 m//s`) will be equal to

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A person is standing on a railway platform. An engine blowing a whistle of frequency 640 Hz approaches him with a speed of 72 km//hr . The frequency of the note heard by the person is (velocity of sound is 340 m//s )

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TARGET PUBLICATION-Sound-Exercise

The frequency of a note emitted by a source changes by 20% as it appro...
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A source of sound is travelling towards a stationary observer. The fre...
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A man is watching two trains, one leaving and the other coming in with...
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An observer moves towards a stationary source of sound with a speed 1/...
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A stone is dropped into a lake from a tower 500 metre high. The sound ...
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Consider the following I. Waves created on the surfaces of a water p...
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It is possible to distinguish between the transverse and longitudinal ...
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When an aeroplane attains a speed higher than the velocity of sound in...
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It takes 2.0 seconds for a sound wave to travel between two fixed poin...
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Oxygen is 16 times heavier than hydrogen. Equal volumes of hydrogen an...
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A string of mass 2.5 kg is under a tension of 200 N The length of the ...
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A man standing between two cliffs claps his hands and starts hearing s...
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