If a source of sound produces 500 compressions and 500 rarefactions in air in 25 seconds, find the frequency of sound produced.

Dear student,
now, the no of waves in 25 seconds is 500 (this is because one typical wave has one compression and one rarefaction)


frequency (basically no. of waves in 1 second) = 500/25

= 20

therefore, the frequency is 20 Hz.

Hopes it is cleared.





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