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Problem 13: What length of the open pipe will produce a frequency of 1200 Hz as its first overtone on a day when the speed of sound is 340 m/s?



Speed of sound, v = 340 ms-1     

First overtone, f2 = 1200 Hz

Required             Length of the pipe, L

Formula               For first overtone, f2 = 2(v/2L)

Put values,

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