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A long glass tube is held vertically in ...

A long glass tube is held vertically in water . A tuning fork is struck and held over the tube . Strong resonances are observed at two successive lengths `0.50 m and 0.84 m` above the surface of water . If the velocity of sound is `340 m//s`, then the frequency of the tuning fork is

A

128 Hz

B

256 Hz

C

384 Hz

D

500 Hz

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The correct Answer is:
D
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