A source of wave produces 40 crests and 40 troughs in 0.4s. What is the frequency of the wave?
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frequency is 100 hertz
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wavelength = 40
time= 0.4
and frequency = wavelength/time
= 40/0.4
= 100 Hz
time= 0.4
and frequency = wavelength/time
= 40/0.4
= 100 Hz
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