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One siren which is giving a sound of frequency 1000 Hz, is going away from a stationary observer towards a wall with the speed of 10 ms'1. What is the frequency of sound heard directly from the siren? Speed of sound in air is 330 ms'1?

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One siren which is giving a sound of frequency 1000 Hz, is going away from a stationary observer towards a wall with the speed of 10 ms'1. What is the frequency of sound heard directly from the siren? Speed of sound in air is 330 ms'1?






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