a) What is the electric potential a distance of 2.1 10 -15 m away from a proton?

a) What is the electric potential a distance of 2.1✕ 10-15 m away from a proton?

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(b) What is the electric potential energy of a system that consists of two protons 2.1✕ 10-15 m apart-as might occur inside a typical nucleus?

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