Question

Give reasons for the following :

(a) The reverberation time of a hall used for speeches should be very short.

(b) A vibrating body produces sound. However no sound is heard when a simple pendulum oscillates in air.

(c) Sounds of same loudness and pitch but produced by different musical instruments like a violin and flute are distinguishable.

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Answer 1

(a) This is need so that the sound can be $\textbf{Heard}$ clearly before the next sound to be produced.

(b) The amplitude of the bob is not so to produce large vibration to produce sound.

(c) This is because $\textbf{Quality }$of different instruments are different.

Answer 2

Explanation:

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