Asatellite and the international space station have the same mass and are going around earth in concentric orbits. the distance of the satellite from earth\'s center is twice that of the international space station\'s distance. what is the ratio of the centripetal force acting on the satellite compared to that acting on the international space station?

a) 0.25

b) 1

c) 2

d) 0.5

e) 4

The momentum of an isolated system is conserved a) only in inelastic collisions. b) only in elastic collisions. c) in both elastic and inelastic collisions

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.