A 20.0-m copper wire, with
1.00 mm diameter and density r = 8920 kg/m^{3} is
stretched to a tension of 150 N. How long will it take a transverse wave to
travel the entire length of the wire?

Example 2

The time of travel of the wave is s.

Answer

The time t a transverse wave needs to travel the length of the wire L = 20.0 m can be calculated from

The speed of the wave v can be found from

We know the tension t = 150 N and we need to find the linear mass density which can be found from

Here V is the volume of the wire and r is its radius. So,