Two circular parallel plates having charges of equal magnitude but opposite sign are separated by 11.58cm. Each plate has a surface area of 0.0105m^2. the magnitude of the electric field between the plates is 5.185kN/C. An electron is released from rest at the negative plate. a) what is the charge on each plate? b) what is the potential difference, or voltage across the plate? c) determine the speed of the electron when it reaches the positive plate. d) determine the acceleration of the electron.