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An atom of plutonium-239 has a nuclear radius 6.64fm and atomic number z=94. assuming that the positive charge is distributed uniformly within the nucleus, what are the magnitude and direction of electric field at the surface of nucleus due to the positive charge?
A) what EQUAL +ve charge should be placed on earth and moon to cancel their Gravitatiopnal pull?
B) what kg of H2 gas would provide you with that charge?