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Unformatted text preview: m C? P21-4) What is the repulsive electrical force between two protons in a nucleus that are 5.0 x 10-15 m apart from each other? P21-7) Two charged balls are 15.0 cm apart. They are moved, and the force on each of them is found to have tripled. How far apart are they now? P21-8) A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -40 m C. How many excess electrons does this person get, and by how much does her mass increase? P21-10) Particles of charge +70, +48, and -80 m C are placed in a line (Fig. 21-46). Calculate the net force on each charge due to the other two....
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- Spring '08