Sarthaks Test
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A nail was gently touched by the hammer and then was hit harder. 

(a) When will be the sound created louder? 

(b) Which characteristic of sound here is responsible for change in sound? 

(c) Give the SI unit of loudness. 

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1 Answer

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(a) Sound is produced only when the nail is hit harder not when it is gently touched. 

(b) Amplitude of the pulsating body. 

(c) The SI unit of loudness is decibel (dB)

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