Problem 6: A research-level Van de Graaff generator has a 1.9-m-diameter metal sphere with a charge of 4.9 mC on it.
Part (a) What is the potential near its surface in MV?
Part (b) At what distance in meters from its center is the potential 1.00 MV?
Part (c) An oxygen atom with three missing electrons is released near the Van de Graaff generator. What is its energy in MeV at the distance from part b?