# A piston is fitted in a cylindrical tube of small cross

Question:

A piston is fitted in a cylindrical tube of small cross section with the other end of the tube open. The tube resonates with a tuning fork of frequency $512 \mathrm{~Hz}$. The piston is gradually pulled out of the tube and it is found that a second resonance occurs when the piston is pulled out through a distance of $32.0 \mathrm{~cm}$. Calculate the speed of sound in the air of the tube.

Solution: