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Two 20x20 cm aluminum plates are held 2.0mm apart. This capacitor is charged to 10nC by connecting the plates to a battery and then the

Two 20x20 cm aluminum plates are held 2.0mm apart. This capacitor is charged to 10nC by connecting the plates to a battery and then the battery is disconnected so each plate remains electrically insulated.

1. How much energy is stored in this capacitor?

2. Using insulated handles on the plates, the plates are pulled apart so that they are 4.0mm apart. How much energy is now stored in this capacitor?

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