A sound source, fixed at the origin, is continuously emitting sound at a frequency of 660 Hz. The sound travels in air at a speed of 330ms−1. A listener is moving along the line x = 336 m at a constant speed of 26ms−1. Find the frequency of the sound as observed by the listener when he is (a) at y = -140 m, (b) at y = 0 and (c) at y = 140 m.

A sound source, fixed at the origin, is continuously emitting sound at

1.	A sound source, fixed at the origin, is continuously emitting sound at a frequency of 660 Hz. The sound travels in air at a speed of 330ms−1. A listener is moving along the line x = 336 m at a constant speed of 26ms−1. Find the frequency of the sound as observed by the listener when he is (a) at y = -140 m, (b) at y = 0 and (c) at y = 140 m.
Answer» A sound source, fixed at the origin, is continuously emitting sound at a frequency of 660 Hz. The sound travels in air at a speed of $330 m s^{- 1}$ . A listener is moving along the line x = 336 m at a constant speed of $26 m s^{- 1}$ . Find the frequency of the sound as observed by the listener when he is (a) at y = -140 m, (b) at y = 0 and (c) at y = 140 m.

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