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Statement of a problem № 3532

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A sound source from a motionless train emits a sinusoidal wave with a source frequency of fs = 514 Hz. Given that the speed of sound in air is 340 m/s and that you are a stationary observer. Find the wavelength of the wave you observe (i) When the train is at rest (ii) When the train is moving towards you at 15 m/s (iii) When the train is moving away from you at 15 m/s>

Solution:
A sound source from a motionless train emits a sinusoidal wave with a source fre

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