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Question

Write true or false for each statement:

(a) When sound propagates in air,it does not carry energy with it.

(b) In a longitudinal wave,compression and rarefaction are formed.

(c) The distance from one compression to nearest rarefaction is called wavelength.

(d) The frequency is measured in second.

(e) The quality of sound depends on the amplitude of wave..

(f) The pitch of sound depends on frequency..

(g) Decibel is the unit of pitch of a sound.

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Solution

(a) When sound propagates in air, it does not carry energy with it.
Answer. False.
(b) In a longitudinal wave, compression and rarefaction are formed.
Answer. True.
(c) The distance from one compression to nearest rarefaction is called wavelength.
Answer. False.
(d) The frequency is measured in second.
Answer. False.
(e) The quality of a sound depends on the amplitude of a wave.
Answer. False.
(f) The pitch of the sound depends on frequency.
Answer. True.
(g) Decibel is the unit of the pitch of a sound.
Answer. False.


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