Need help asap, will rate, and thanks! A parallel-plate air-filled capacitor hav

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Need help asap, will rate, and thanks!
A parallel-plate air-filled capacitor having area 49 cm2 and plate spacing 1.0 mm is charged to a potential difference of650 V. Find the following values. (a) the capacitance
1 pF

(b) the magnitude of the charge on each plate
2 nC

(c) the stored energy
3 µJ

(d) the electric field between the plates
4 V/m

(e) the energy density between the plates
5 J/m3 Need help asap, will rate, and thanks!
A parallel-plate air-filled capacitor having area 49 cm2 and plate spacing 1.0 mm is charged to a potential difference of650 V. Find the following values. (a) the capacitance
1 pF

(b) the magnitude of the charge on each plate
2 nC

(c) the stored energy
3 µJ

(d) the electric field between the plates
4 V/m

(e) the energy density between the plates
5 J/m3

Explanation / Answer

(a) .      C = A / d = 8.85 x 10-12 * 49 x 10-4 / 1.0 x10-3=     43.365pF . (b)        q = CV = 43.365 pF * 650 V =    28.187nC . (c)          storedenergy = (1/2) q V = (1/2) * 28.187 x10-9 * 650 =      9.16 uJ . (d)             E field = V / d = 650 / 0.001 =   650000 V/m . (e)      energy density = energy /volume = energy / Ad = 9.16 x 10-6 / 49 x10-4 * 0.001 = .             =   1.869 J/m3

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