Determining the energy stored in the capacitor
A 15.0-V battery is connected to a capacitor, resulting in 55.0 µC of charge stored on the capacitor. How much energy is stored in the capacitor?
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Imagine that you fire a proton at the nucleus of a gold atom (which contains 79 protons and 118 neutrons). What does the proton's initial speed have to be if it is to penetrate the gold nucleus (whose raduis is about 6 fm)?
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