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Physics
Tutor: None Selected Time limit: 1 Day

2.

A bat at rest sends out ultrasonic sound waves at 50.5khz   and receives them returned from an object moving directly away from it at 27.0m/s .what is the receive sound frequency?

Jul 24th, 2015

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2) f'= V*fo/(V+u)

f" = (V-u)*f'/V = (V-u)*fo/(V+u) = ((343-27)*50.5*1000)/(343+27) f" = 43129.72 Hz = 43.12972 kHz


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Jul 24th, 2015

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