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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

{(\frac{5}{6})}^{t h}

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

350 m / s

then the speed of engine is

Q. The frequency of the whistle of an engine appears to be

{(\frac{5}{6})}^{t h}

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

350 m/s

, then the speed of the engine is:

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

Q. The apparent frequency of the whistle of an engine changes in the ratio of 6:5 as the engine passes a stationary observer. If the velocity of sound is 330 m/s, then the velocity of the engine is

Q. The apparent frequency of the whistle of an engine changes in the ratio of 6:5 as the engine passes a stationary observer. If the velocity of sound is 330 m/s, then the velocity of the engine is

Q. An engine blowing whistle, is approaching a stationary observer with a velocity of

110 m s^{- 1}

. The ratio of frequencies heard by the observer while engine approaching and receding away from him will be (

i f v = 330 m s^{- 1}

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