Which causes the medium to vibrate in a direction parallel to the wave’s motion?

a transverse wave

a longitudinal wave

a surface wave

The density of a liquid could be found by using

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.

Does anyone have the answers to online physics course plato course physics, semester a v3.0