A bat locates insects by emitting ultrasonic chirps and

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A bat locates insects by emitting ultrasonic "chirps" and then listening for echoes from the bugs. Suppose a bat chirp has a frequency of 21 kHz. How fast would the bat have to fly, and in what direction, for you to just barely be able to hear the chirp at 18 kHz?

Reference no: EM13615386

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