V=ρB
VairVpipe=ρB2ρB=21
Vpipe=2Vair
fn=2l(n+1)Vpipe
f1−f0=2lVpipe=22300=105.75Hz(if2=1.41)
=106.05Hz(if2=1.414)
A one metre long (both ends open) organ pipe is kept in a gas that has double the density of air at STP. Assuming the speed of sound in air at STP is 300m/s, the frequency difference between the fundamental and second harmonic of this pipe is __________ Hz.
Held on 8 Jan 2020 · Verified 6 Jul 2026.
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