The energy (U) stored in a capacitor is given by the formula:
\[ U = \frac{1}{2} C V^2 \]
where \( C \) is the capacitance and \( V \) is the voltage. Here, \( C = 8.00 \, \text{nF} = 8.00 \times 10^{-9} \, \text{F} \) and \( V = 10.0 \, \text{V} \).
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