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Solution


Q.

An organ pipe 40 cm long is open at both ends. The speed of sound in air is 360 ms-1. The frequency of the second harmonic is ______ Hz.             [2023]

Ans.

(900)

For second harmonic of an open organ pipe, L=λ

So the frequency of vibration is f=vλ

f=Vλ=VL=36040100=900 Hz