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A traveling wave has displacement given by y(x, t) = (2.0 cm) × cos(2πx – 4πt), where x is measured in cm and t in s.
a. Draw a snapshot graph of this wave at t = 0 s.
b. On the same set of axes, use a dotted line to show the snapshot graph of the wave at t = 1/8 s.
c. What is the speed of the wave?
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