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Question: 

650 V is applied to a 2800-pF capacitor. How much energy is stored?

Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014. Reprinted by permission of Pearson Education Inc., New York.
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Quick Answer: 

$5.9 \times 10^{-4} \textrm{ J}$

Giancoli 7th Edition, Chapter 17, Problem 52

(0:24)

Chapter 17, Problem 52 is solved.

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Transcript for this Giancoli solution

This is Giancoli Answers with Mr. Dychko. The energy stored in a capacitor is one half times its capacitance times the voltage across it, squared. So that's one half times 2800 times ten to the minus twelve farads times 650 volts squared which gives 5.9 times ten to the minus four Joules.