A pulse is sent traveling along a rope under a tension of 36 N
whose mass per unit length abruptly changes, from 14 kg/m to 49
kg/m. The length of the rope is 2.3 m for the first section and 2.6
m for the second, and the second rope is rigidly fixed to a wall.
Two pulses will eventually be detected at the origin: the pulse
that was reflected from the medium discontinuity and the pulse that
was originally transmitted, which hits the wall and is reflected
back and transmitted through the first rope. What is the time
difference, _t, between the two pulses detected at the origin?
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