(a) Show that the average rate with which energy
Chapter 15, Problem 15.21(choose chapter or problem)
(a) Show that the average rate with which energy istransported along a cord by a mechanical wave of frequency /and amplitude A isP = 27T2/Jivf2^ ,where v is the speed of the wave and /jl is the mass per unitlength of the cord. (b) If the cord is under a tensionFt = 135 N and has mass per unit length 0.10 kg/m, whatpower is required to transmit 120-Hz transverse waves ofamplitude 2.0 cm?
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