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A bat flies toward a wall at a speed of 7.0  m / s. As it flies, the bat emits an ultrasonic sound wave with frequency 30.0 kHz. What frequency does the bat hear in the reflected wave? | Numerade
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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 25 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 20 kHz ? | Numerade
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