A 2nd Harmonic standing wave with amplitude of 5 mm exists on a 0.8 m long string that is fixed at both ends. The wave velocity for this string is 200 m/s. Using the wave function for a standing wave, y(x,t) = A sin(kx) sin(ot), calculate the local vibration amplitude at x = 0.15 m, when t = 5.5 msec.
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