A car traveling at a speed of 30 m/s encounters an emergency and comes to a complete stop (vf = 0 m/s). How much time will it take for the car to stop if its acceleration is -4 m/s2?

Current from a charged capacitor lights a bulb. as time goes on the brightness of the

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.

Newtons view of arrangement of the universe. don't copy from anywhere.