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    Physics question? A factory whistle emits sound of frequency 720 Hz. When the

    wind velocity is 12.1 m/s from? A factory whistle emits sound of frequency 720 Hz. a) When the wind velocity is 12.1 m/s from the north, what frequency will observers hear who are located, at rest, due north of the whistle? Assume Temperature= 20 C b) What frequency will observers hear who are...
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