A tuning fork whose natural frequency is `440 H_(Z)` is placed just above the open end of a tube that contains water. The water is slowly drained from the tube while the tuning fork remains in place and is kapt vibrating. The sound is found to be echanced when the air column is `60 cm` long and when it is `100 cm` long . Find the speed of sound in air.

Explanation

`(lambda)/(2) = (100 - 60) xx 10^(-2) m`
`:. lambda = 0.8 m`
Now, `nu = f lambda = 440 xx 0.8`
`= 352 m//s`