A.What is the magnitude of the electric force between a proton and an electron w

Question

A.What is the magnitude of the electric force between a proton and an electron when they are at a distance of 8.85 angstrom from each other? B.What is the magnitude of the electric force between two protons inside a nucleus when they are at a distance of 8.85 fermi from each other? C.What is the magnitude of the electric force between an 'up' and a 'down' quark inside a proton when they are at a distance of 0.991 fermi from each other? (The up quark has an electric charge of (+2/3)e, the down quark has an electric charge of (-1/3)e, where e is the elementary charge.)

Explanation / Answer

don't let the small scale be a problem this is solved simply by Coulombs Law: F = k q q' / (r^2) F = force k = Coulomb's constant ~ 9 x 10^9 N m^2 / C^2 q and q' are the charges of the two particles r = distance between the particles note that 1 angstrom = 10^-10 meters and that 1 fermi = 10^-15 meters and e = 1.602 *10^-19 C don't let this curve-ball type of problem confuse you. Approach it the same way you would a macroscopic system of charged particles. If you need further help with the numerical calculations, let me know, and I will get back to you. Otherwise, just convert everything to mks units and you will eliminate much confusion in your future

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