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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)? Express your answer as a fraction of the speed of light (One way to measure nuclear radii is to find the speed that such a proton ust have to be absorbed).

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