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A vertical tube is made to stand in wate...

A vertical tube is made to stand in water so that the waterlevel can be adjusted . Sound waves of frequency 320 Hz are sent into the top of the tube.If standing waves are produced at two successive water levels of 20cm and 73cm, what is the speed of sound waves in the air in the tube ?

Text Solution

Verified by Experts

`v = 320 Hz,l_(1) =20 cm= 20 xx10^(-2) m `
`l_(2) = 73cm= 73xx10^(-2) m, v= ? `
`v= 2v( l_(2) - l_(1))`
`= 2 xx 320 ( 73 xx 10^(-2) -20 xx 10^(-2))`
` :. v =339 m //s `
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