In a resonance tube experiment to determine the speed of sound in air, a pipe of diameter 5 cm is used. The air column in pipe resonates with a tuning fork of frequency 480 Hz when the minimum length of the air column is 16 cm. If the speed of sound in air at room temperature = 6 η (in m/sec.) Find η
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(56)
Fundamental frequency, f = 
∴ speed of sound v = 4f ( λ + 0.6r)
or v = (4) (480) [(0.16) + (0.6) (0.025)] = 336 m/s
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