1.

If an open organ pipe is sounded with a tuning fork having frequency 256 Hz resonance occurred at 35 cm and 105 cm the velocity of sound is :

Answer»

360 m/s
512 m/s
524 m/s
all of these

Solution :`l_(1) = 35 cm and l_(1 = 105 ` cm .
`therefore (lambda)/(2) = l_(2) - l_(1 ) "" rArr lambda_(2) = 2 (105 -35) `
= 140 cm=1.4 m
V - v `lambda= 256 X 1.4 = 358. 4` m/s .
Hence the correct choice is (a) .


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