Two identical balls move at the same speed what momentum do the balls possess

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e

Avehicle accelerates from 0 to 30 m/s in 10 seconds on a straight road

The receptor cells that convert light energy into neural signals are called