A parallel-plate air-filled capacitor having area 47 cm2 and plate spacing 0.93 mm is charged to a potential difference of 640 V. Find (a) the capacitance, (b) the magnitude of the charge on each plate, (c) the stored energy, (d) the electric field between the plates, (e) the energy density between the plates. (a) Number Units PF (b) Number i Units nc (c) Number i Units MJ (d) Number Units N/C or V/m (e) Number i Units J/m^ 3