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A bat, flying at 4.9 m/s, pursues an insect that is flying at 1.1 m/s in...

A bat, flying at 4.9 m/s, pursues an insect that is flying at 1.1 m/s in the same direction. The bat emits a 47000-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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