then what is the minimum frequency heard by an observer which is far away from the centre : – ( V sound​=340 m/s)

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A whistle revolves in a circle with angular speed ω=20 rad/sec using a string of length 50 cm. If the frequency of sound from the whistle is 385 Hz, then what is the minimum frequency heard by an observer which is far away from the centre : – ( V sound​=340 m/s)
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A whistle revolves in a circle with angular speed ω=20 rad/sec using a string of length 50 cm. If the frequency of sound from the whistle is 385 Hz, then what is the minimum frequency heard by an observer which is far away from the centre : – ( V sound​=340 m/s) A whistle revolves [...]
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Tags: A whistle revolves in a circle with angular speed ω=20 rad/sec using a string of length 50 cm. If the frequency of sound from the whistle is 385 Hz , then what is the minimum frequency heard by an observer which is far away from the centre : - ( V sound​=340 m/s) ,