# An Exercise in Integration

Two parallel insulting plates of area $$A$$ are put close together. Their inner surfaces are each given a uniform charge $$+Q$$. Find the force needed to hold the plates together. (in Newtons)

Details: $$A=300m$$, $$Q=0.23C$$, $$\epsilon_0=8.854\times10^{-12} Fm^{-1}$$

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