Asteel wire has a length of 12.0 m and a mass of 2.10 kg. What shouldbe the tension in the wire so that speed of a transverse wave on thewire equals the speed of sound in dry air at 20 °C = 343 m s–1.
Lengthof the steel wire, l= 12 m
Massof the steel wire, m= 2.10 kg
Velocityof the transverse wave, v= 343 m/s
Massper unit length,
Fortension T,velocity of the transverse wave can be obtained using the relation:
∴T= v2µ
= (343)2× 0.175 = 20588.575 ≈2.06 × 104N