At a time t = 0, a train of waves has the form, y = 4 sin 2π (x/100). The velocity of the wave is 30 cm/s. Find the equation giving the wave form at a time t = 2 s.
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A wave train has the equation y = 4sin (30pi t + 0.1x) where x is in cm and t in seconds. What is the frequency of the source? How much time does a wave
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