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## Homework Statement

How much energy must a 6.0 V battery expend to fully charge a 0.13 µF and a 0.21 µF capacitor when they are placed in the following configurations?

Another question if anyone can help we get started on this one. I'm not sure where to begin

How strong is the electric field between the plates of an 0.86 µF air-gap capacitor if they are 1.9 mm apart and each has a charge of 74 µC?

## Homework Equations

In my attempt at a solution.

## The Attempt at a Solution

http://imgur.com/a/ELKdZ#1

Part b series

I keep getting 0.000001 J but it says it not right, can any one help me out?