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Unformatted text preview: the electric field the same as in (ii) or different? Activity 2: The figure shows an alpha particle, consisting of two protons and two neutrons, traveling head-on toward a positively charged gold nucleus (79 protons). At a distance of r, the alpha particle comes to a momentary stop and then it reverses its path. Calculate the kinetic energy of the alpha particle when it was very far away from the gold nucleus. (This problem is about energy conservation – think about what the initial (far away) and final kinetic and potential energies are)....
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