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A physics professor demonstrates the Doppler effect by tying a 900 Hz sound generator to a...

A physics professor demonstrates the Doppler effect by tying a 900 Hz sound generator to a 1.0- m -long rope and whirling it around her head in a horizontal circle at 100 rpm .

What is the difference between the highest frequency heard by a student in the classroom and the initial frequency of the sound generator?

What is the difference between the lowest frequency heard by a student in the classroom and the initial frequency of the sound generator?

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