What is the frequency heard by the observer standing near the tunnel entrance? E

Question

What is the frequency heard by the observer standing near the tunnel entrance? Express your answer using four significant figures.
Part B The sound from the whistle reflects from the cliff back to the engineer in the train.What is the frequency heard by the engineer? Express your answer using four significant figures. Part B The sound from the whistle reflects from the cliff back to the engineer in the train.What is the frequency heard by the engineer? Express your answer using four significant figures.


Suppose the train is backing away from the cliff with a speed of 22.5 and is sounding its 650.0 whistle.

Part A What is the frequency heard by the observer standing near the tunnel entrance? Express your answer using four significant figures. =

Part B The sound from the whistle reflects from the cliff back to the engineer in the train.What is the frequency heard by the engineer? Express your answer using four significant figures.

Explanation / Answer

suppose speed of sound = 360 m/s

a) f = 650*(360)/(360+22.5) = 611.76 Hz

b) f = 611.76*(360-22.5)/360 = 573.525 Hz

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