IIT JEE , AIEEE Forum - Physics , Mechanics

rakesh61


A tuning fork of frequency 480 Hz resonates with a tube closed at one end of length 16 cm and diameter 5 cm in fundamental mode. Calculate velocity of sound in air.

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him26.89

freq. = v/4l

but as we are given diameter

so we have to use end correction(e) = 0.3 d

:. eff. length = l+e

:. freq. = v/4(l+e) (d= diameter)

=> 480 = v/4(16+ 1.5)/100 (bcos length should be in m)

=> v = 336 m/s