Hey Physics Geniuses!!!?

Question

i cant solve these three problems can anyone help out?? Tnx!!!
Arigatogozaimasu!!!

What voltage is required to store 7.2 x 10-5 C of charges on the plates of a 6.0 F capacitor?

One farad is a large capacitance. To see just how large, determine the area of each plate of an empty, one farad parallel plate capacitor whose plate separation is one meter. Express your answer in square miles.

A parallel plate capacitor has a capacitance of 7.0 F when filled with a dielectric. The area of each plate is 1.5 m2 and the separation between the plates is 1.0 x 10-5 m. What is the dielectric constant of the dielectric?

Answer 1

1. V = Q/C
2. area = separation*C/(K*e0) = 112940906676.075 m^2
(k=1)
You can convert that to mi^2. (Or not. Why do they make you do idiotic conversions from convenient metric units to nonmetric? Fight the power!)
3. K = separation*C/(e0*area) = 5.2706

Answer 2

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