PLEASE HELP Two friends are playing with a long spring. Tim (on the left) sends a single wave pulse with an amplitude of +2 down the spring at the same time that Jim (on the right) sends a wave pulse with an amplitude of -2. (See picture above.) Which of the following statements, do you feel, best describes will happen when the pulses reach each other? Explain your choice. A. The pulses will bounce off each other.
B. The pulses will pass through each other.
C. The pulses will cancel out and will disappear from the spring.

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.