Acord of mass 0.65 kg is stretched between two supports 28 m apart. if the tension in the cord is 150 n, 2 how long will it take a pulse to travel from one support to the other?

Ans: Time taken by a pulse to travel from one support to the other = 0.348s

Explanation:
First you need to find out the speed of the wave.

Since
Speed = v = 

Where
T = Tension in the cord = 150N
μ = Mass per unit length = mass/Length = 0.65/28 = 0.0232 kg/m

So
v =  = 80.41 m/s

Now the time-taken by the wave = t = Length/speed = 28/80.41=0.348s

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