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(II) A sinusoidal wave traveling on a string in the negative x direction has amplitude 1.00 cm, wavelength 3.00 cm, and frequency 245 Hz. At t = 0, the particle of string at x = 0 is displaced a distance D = 0.80 cm above the origin and is moving upward, (a) Sketch the shape of the wave at t = 0 and (b) determine the function of x and t that describes the wave.
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