3. you toss a ball at an angle 45° above the

horizontal. after the ball leaves your hands, its

motion can be described in terms of displacement,

velocity, and acceleration. for each item, is the

quantity constant, changing linearly, or changing

nonlinearly during consecutive time intervals?

displacement

velocity

acceleration

displacement

velocity

acceleration

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.