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We can model a layer of rainelouds as a plane of excess eharge and the earths surface as a second excess charge with the sam

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Answer #1

a)

C = eo A / d

C = 8.85*10^-12* 10^6 / 500

C = 1.77*10^-8 F

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b)

V = E d = 3*10^6* 500 = 15*10^8 V

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c)

q = CV = 1.77* 15 = 26.55 C

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d)

U = 0.5 CV^2

U = 0.5* 1.77*10^-8* (15*10^8)^2

U = 1.99*10^10 J

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Comment in case any doubt, will reply for sure.. Goodluck

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