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NCERT CLASS IX - Science Textbook

Chapter 12 - Sound

A person is listening to a tone of 500 Hz sitting at a distance of 450 m from the source of the sound. What is the time interval between successive compressions from the source?



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Frequency of sound source = f = 500 Hz

Time interval between successive compressions = time period of sound wave
 time period of the sound wave = 1/ frequency
                                             = 1 / 500 sec
                 = 2 milli seconds.

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