A long wire PQR is made by joining two wires PQ and QR of equal radii. PQ has a length 4.8 m and mass 0.06 kg. QR has length 2.56 m and mass 0.2 kg. The wire PQR is under a tension of 80 N. A sinusoidal wave pulse of amplitude 3.5 cm is sent along the wire PQ from the end P . No power is dissipated during the propagation of the wave pulse. Calculate :
(1) The time taken by the wave pulse to reach the other end R .
(2) The amplitude of the reflected and transmitted wave pulse after the incident wave pulse crosses the joint Q .