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A bat is flitting about in a cave, navigating via ultrasonic bleeps. Assume that the sound...

A bat is flitting about in a cave, navigating via ultrasonic bleeps. Assume that the sound emission frequency of the bat is 39,113 Hz. During one fast swoop directly toward a flat wall surface, the bat is moving at 12 m/s, what frequency does the bat hear reflected off the wall? The speed of sound is 340 m/s.

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