Two pulses are moving along a string. One pulse is moving to the right and the second is moving to the
left. Both pulses reach point P at the same instant.
Which diagram shows the appearance of the string
after the pulses pass point P?

Ablue car pulls away from a red stop-light just after it has turned green with a constant acceleration of 0.5 m/s 2 . a green car arrives at the position of the stop-light 6.5 s after the light had turned green. if t = 0 when the light turns green, at what time does the green car catch the blue car if the green car maintains the slowest constant speed necessary to catch up to the blue car? answer in units of s.