In some of these problems you may need to know that the mass of an electron is 9.11 x 10-31 kg, the mass of a proton is 1.67 x 10-27 kg, the electric charge of the electron is -1.6 x 10-19 C, and the charge of a proton is 1.6 x 10-19 C.
A uranium nucleus has 92 protons. (a) Determine the magnitude of the E field at a distance of 0.58 x 10-12 m from the nucleus (about the radius of the innermost electron orbit around the nucleus). (b) What is the magnitude of the force exerted on an electron by this E field? (c) What assumptions did you make? If the assumptions are not valid, will the magnitude in part (b) be an overestimate or underestimate of the actual value?
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