Question: Two train whistles, A and B, each have a frequency of 392 Hz. A is stationary and B is moving toward the right (away from

Two train whistles, A and B, each have a frequency of 392 Hz. A is stationary and B is moving toward the right (away from A) at a speed of35.0 m/s. A listener is between the two whistles and is moving toward the right with a speed of 15.0 m/s (Fig. 16.41). No wind is blowing.
(a) What is the frequency from A as heard by the listener?
(b) What is the frequency from Bas heard by the listener?
(c) What is the beat frequency detected by the listener?

Uy - 35.0 m/s A =0 UL = 15.0 m/s

Uy - 35.0 m/s A =0 UL = 15.0 m/s

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