Apoint charge of magnitude q is at the center of a cube with sides of length l. a)what is the electric flux through each of the six faces of the cube? b)what would be the flux through a face of the cube if its sides were of length l1 ?

Can someone explain to me how to do this problem ?

Power can be defined as a. the distance over which work was done. b. how much work can be done in a given time. c. all the work in an given area. d. the energy required to do work.

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.