What frequency does a listener standing near crossing hear

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The speed of sound in air is about 660miles/hour. A passenger train approaches an unguarded railroad crossing at a constant speed of 60 miles/hour and the locomotive sounds its horn which has a frequency of 400 Hz.

[A]. What frequency does a listener standing near the crossing hear?

[B]. If the train continues past the crossing at the same speed, what frequency does the listener hear?

[C]. What frequency does a person riding on top of the last car hear? Why?

Reference no: EM13905703

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