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Ultrasonic Sound

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ntfrequency of whistle of engine appears to drop to 2/3 rd of its actual value when it passes a stationary observer . velocity of air = 330 find speed of enginen

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Q. The pitch of the whistle of an engine appears to drop to

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of the original frequency , when it passes a stationary observer. If the speed of sound in air is

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[Assume, medium is stationary and the original frequency of the whistle is measured when the source and observer are at rest]

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