Question

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

Answer 1

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Explanation:

Answer

solution:

frequency n = 320Hz

length of water level ( l ) = 20cm

second lenghth of water level l(2) = 73cm

velocity of sound in air ( v ) = 2n( l2 - l1 )

v = 2 × 320( 73 - 20 ) , v = 339m/s