An underwater device directs ultrasounds of frequency 75 khz towards water surface. What is the wavelength of sound in the air above the water surface and what is its frequency?
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frequency = 75000 Hz
velocity of sound in air = 340m/s
wave length = velocity / frequency
= 340/75000
= 0.004
= 0.01m
velocity of sound in air = 340m/s
wave length = velocity / frequency
= 340/75000
= 0.004
= 0.01m
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