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A parallel plate capacitor with a plate area of 23.0 cm2 and air in the space...

A parallel plate capacitor with a plate area of 23.0 cm2 and air in the space between the plates, which are separated by 1.1 mm, is connected to a 12.0-V battery. If the plates are pulled back so that the separation increases to 5.9 mm, how much work is done?

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