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 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 cm. Calculate the speed of sound in the air of the tube.
Frequency of tuning fork
Let the speed of sound in the tube be .
Let be the length at which the piston resonates for the first time and be the length at which the piston resonates for the second time.
Hence, the speed of the sound in the tube is 328 m/s.
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