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2) A standing wave in a chord is described by the equation: y (x,t) = 0.31sin (13.2x + 5.9t + 2.4)
All parameters are given in international units.
a) Calculate the instantaneous speed of a piece of rope located at position x = 0.8m at time
t = 3.6s.
b) Calculate the speed of propagation of the wave. Indicate the direction of movement
with the sign of your answer (+ v if it goes to the right and -v if it goes to the left).

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