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A helium nucleus (charge +2e) moves through a potential difference deltaV= -0.300 kV. It's initial kinetic energy is 3.70 x 10^-16 J. What is it's final kinetic energy?

A 2.2-μF capacitor is connected to a 8.4-V battery. What is the magnitude of the charge on each plate?

A 3.6-μF capacitor is connected to a 8.6-V battery. What is the magnitude of the charge on each plate?

If a capacitor has a capacitance of 10.2 μF and we wish to lower the potential diffence across the plates by 30.0 V, how much charge will we have to remove?

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