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"Through what voltage must an α-particle, with its charge of +2e, be accelerated so that it has just enough energy to reach a distance of 1.7×10−14 m from the surface of a gold nucleus? (Assume the gold nucleus remains stationary and can be treated as a point charge.)"
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"Through what voltage must an α-particle, with its charge of +2e, be accelerated so that it has just...
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