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A 3 meter long rope attached to a heavy object is being waved side to side on the ground by a person to entertain their little sister. After 3 seconds, there are 3 bumps on the left and 3 bumps on the right of the rope, covering its entire length. The displacement function representing the rope's motion at 3 seconds is D(x) = 0.20 sin(2πx). The wave speed is calculated to be 1 m/s based on the wavelength of 1 meter and a period of 1 second between full wavelengths.
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