Question: A bat moving at 7.7 m/s is chasing a flying insect. The bat emits a 48 kHz chirp and receives back an echo at 48.35

A bat moving at 7.7 m/s is chasing a flying insect. The bat emits a 48 kHz chirp and receives back an echo at 48.35 kHz. At what speed is the bat gaining on its prey? Take the speed of sound in air to be 341 m/s. Answer in units of m/s.

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