Assam produces 40 compressions and 40 rarefactions in 0.4 seconds. what is the frequency of the wave?

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Solution

1 compression + 1 rarefraction = 1 cycle
40 compression + 40 rarefraction = 40 cycle

0.4 sec to complete 40 cycle

Frequency is no. of cycles per second = 40/0.4 = 100hz , that is it completes 100 cycle in 1 second

Time period = 1/f= 1/100=0.01s

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