A parallel-plate air-filled capacitor having area 51cm2and plate spacing 1.0 mm is charged to a potential differenceof 670 V. Find
(a) the capacitance in picofarads,
(b) the magnitude of the charge innanocoulombs on each plate,
(c) the stored energy in microjoules,
(d) the electric field between the plates,
(e) the energy density between the plates.