give reason -we cannot hear sound on vibrating our hands forward and backward
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because range of hearing for human ears is from 20Hz to 20000Hz and the sound produced by such vibration does not fall in this range.
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Answer:
range of hearing for human ears is from 20Hz to 20000Hz and the sound produced by such vibration does not fall in this range.
Explanation: range of hearing for human ears is from 20Hz to 20000Hz and the sound produced by such vibration does not fall in this range.
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