For a certain organ pipe, the first three resonance frequencies are in the ratio of 1 : 3 : 5 respectively. If the frequency of fifth harmonic is 405 Hz and the speed of sound in air is 324 m s -1 the length of the organ pipe is_____m.
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(1)
It is given,
f s = 405 Hz.
As the first three resonance frequencies are in the ratio of 1 : 3 : 5, therefore it must be a closed organ pipe.
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