What is the second lowest resonant frequency for a 0.7 m long organ pipe closed at one end? e) 515 hz d) 368 hz c) 405 hz b) 429 hz a) 322 hz

(d) 368 Hz

Explanation:

The resonance frequency of one closed end pipe is given by where n =1,3,5,7------------

Here we are talking about second lowest resonant frequency so n=3

The speed of sound v = 343 m/sec

Length of pipe L =0.7 m

So

Which is closest to 368 Hz so option (d) will be the correct answer

all of the answers are correct.

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