Physics, asked by mithunn30, 11 months ago

sound is produced when a body undergoes to and fro movement.However,no sound is produced when a person waves his/her hand. why?

Answers

Answered by fister

thats because the minimum to and fro motion needed is 20 vibration per second to hear sound. human hand cannot wave 20 times in a second, so sound is not produced.

hope you understand it.

mithunn30: thanks bro

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