A phone cord is 2.89 m long. The cord has a mass of 0.258 kg. A transverse wave pulse is produced by plucking one end of the tautcord. The pulse makes four trips down and back along the cord in 0.737 s. What is the tension in the cord

Explanation:

Given,

Length , l=2.89 m

Mass , M=0.258 Kg

Now, displacement

Velocity of waves

Now, velocity,

The tension

Tension in the chord is equal to  

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

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