A one metre long (both ends open) organ pipe is kept in a gas that has double the density of air...
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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 STP is \( 300 \mathrm{~m} / \mathrm{s} \), the frequency difference between the fundamental and second harmonic of this pipe is \( \mathrm{Hz} \).
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