A volunteer is holding the other end, so that a standing wave is set up on the spring. The spring is vibrating with 3 antinodes. What is the frequency in hertz? What is the period? How many nodes are on the spring? What overtone is the spring vibrating in?

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.