A 20-mF capacitor charged to 2.0 kV and a 40-mF capacitor charged to 3.0 kV are connected to each other, with the positive plate of each connected to the negative plate of the other. What is the final charge on the 20-mF capacitor after the two are so connected?
a. 53 mC
b. 27 mC
c. 40 mC
d. 80 mC
e. 39 mC
B
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