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Physics 10 Online
OpenStudy (anonymous):

It is known that the gravitational force of attraction between two alpha particles is much weaker than the electrical repulsion. For two alpha particles at a distance d apart, calculate the ratio of the size of the gravitational attraction to that of the electrical repulsion. Use the following data: k = 8.99×109 Nm2/C2 charge on one of the alpha particles = 3.20×10-19 C G = 6.67×10-11 Nm2/kg2 mass of one of the alpha particles = 6.64×10-27 kg.

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