Physics, asked by smilinggirl789, 11 months ago

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Answered by shahoam21
1

Answer:

Explanation:

We know that  20 compressions and 20 rarefactions make   20 oscillation

of the wave so the time period is 0.4/20=0.02 s

so  frequency is  f=1/T

1/0.02=50 Hz 

Yes, we can hear that sound

Answered by Anisha5119
8

Answer:

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