The three ropes in the figure are tied to a small, very light ring. two of these ropes are anchored to walls at right angles with tensions t1 = 20 n and t2 = 60 n. what are the magnitude and direction of the tension vector t3 in the third rope?
correct: your answer is correct. n. ° (below the positive x-axis)

Lets say that an object of a certain volume has a certin mass. what happens to its mass when you double its volume?

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

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.