Question

A steel wire has a length of 12.0m and a mass of 2.10kg. What should be the tension in the wire so that speed of a transverse wave on the wire equals the speed of sound in dry air at `20^(@)C=343ms^(-1)`.

Answer 1

Here, `l=12m, M=2.10kg, T=2.06xx10^(4)N, v=?`
`v=sqrt((T)/(m))=sqrt((T)/(M//L))=sqrt((2.06xx10^(4))/(2.10//12))=3.43xx10^(2)m//s`