A bat at flying east at 30 ms sends out ultrasonic waves at, Ask an Expert

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A bat at flying east at 30 m/s sends out ultrasonic waves at 60kHz and receives them returned from an object moving east at 35.0 m/s Assume the speed of sound in air is 343 m/s

1. What is the sound frequency as heard by the easterly moving object?

2. What is the sound frequency of the reflected wave as heard by bat?

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