Fifth harmonic of closed organ pipe equals first harmonic of open pipe:
f5 closed=f1 open
4Lclosed5v=2Lopenv
LopenLclosed=25
Since the ratio is x5, we get x=2.
The fifth harmonic of a closed organ pipe is found to be in unison with the first harmonic of an open pipe. The ratio of lengths of closed pipe to that of the open pipe is 5/x. The value of x is ____.
Held on 24 Jan 2026 · Verified 6 Jul 2026.
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