Now Desmond and Cherie tackle a homework problem. Two wave pulses travel on a string toward each other. The wave pulses can be described as 5 -5 y1 = (kx - wt)2 + 2 and yz = (kx + ct - 6)2 + 2, where k = 2 rad/m and w = 4 rad/s. At what instant do the two cancel everywhere? (Assume x is in meters and t is in seconds.) x Your response differs from the correct answer by more than 100%. s At what point do the two pulses always cancel? X The correct answer is not zero. m