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a wave is travelling with a speed v along the x axis in the positive direction....

a wave is travelling with a speed v along the x ax

a wave is travelling with a speed v along the x axis in the positive direction. The upper graph shows the displacement y versus the distance x for a given instant of time. The lower graph shows the displacement y versus the time t for any given point x. From the information in the graphs, calculate the wave speed v.

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