If the speed of a wave in air 400m/s and time period of the oscillation is 10 msec. Find its frequency and wavelength.
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speed of a wave in air = 400m/s
time period of the oscillation = 10 sec
frequency = 1/t
frequency = 1/10
wavelength = velocity/frequency
wavelength = 400/0.1
wavelength = 4000
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