A piano wire weighting `4 g` and having a length of `90.0 cm` emits a fundamental frequency corresponding to the `"Middle C" (v = 125 Hz)`. Find the tension in the wire.

Answer

`225 N`

Explanation

`l = 90 cm = 0.9m`
`mu = (4)/(90) gm//cm`
`= (4)/(900) Kg//m`
`f = 125`
`f = (1)/(2L) sqrt((T)/(mu))`
`125 = (1)/(2 xx 0.9) sqrt((T xx 900)/(4))`
`T = 225N`