Question: A bat, flying at 5 . 7 m / s , pursues an insect that is flying at 1 . 6 m / s in

A bat, flying at 5.7 m/s, pursues an insect that is flying at 1.6 m/s in the same direction. The bat emits a 48000-Hz sonar pulse. Take the speed of sound to be 343 m/s.
At what frequency, in hertz, does the bat hear the pulse reflected back from the insect?

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