A cork on the surface of water moves up and down as a wave passes across the surface. The diagram shows how the height of the cork above the average level of the surface varies with time. [Figure 19.1 - Graph of height vs time] The numerical value of the wavelength of this wave is equal to the numerical value of the amplitude of this wave. What is the speed of the wave?
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✓ Correct answer
C: 4.0 cm/s
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