2. Energy and Capacitance
a. Calculate the electric potential energy stored in a 1.7 x 10^-11 F capacitor that stores 3.40 x 10^-10 C of charge at 20.0 V.
b. Two positive charges are brought closer together. Write one or two sentences to describe the work done and the energy conversion that occurs.
c. Calculate the capacitance of a system that stores 8.0 x 10^-10 C of charge at 25.0 V.
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