The standing wave pattern shown in the tube has a wave speed of `5.0 ms^(-1)`. What is the frequency of the standing wave [ in `Hz` approx.] ?

Answer

`3`

Explanation

The pattern corresponds to
`l = ( 5 lambda)/(4) = 2.0 m` `lambda = (8)/(5) m`
With speed `v = 5.0 ms^(-1)`
`f = (v)/(lambda) = ( 5 xx 5)/( 8) = 3.1 Hz`