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Q8: Two sinusoidal waves with the same amplitude of 9.00 mm and the same wavelength travel together along a string that is stretched along an x axis. Their resultant wave is shown twice in fig., as valley A travels in the negative direction of the x axis by distance d=56 cm in 8 ms. The tick marks along the axis are separated by 10cm, and height H is 8mm. Let the equation of one wave be of the form where ϕ1 =0 and you must choose the correct sign in front of ω, for the equation of the other wave, what are (a)ym (b) k (c)ω (d) ϕ2 and (e) the sign in front of ω?

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