A research Van de Graaff generator has a 2.40 m diameter metal sphere with a charge of 58.0 C on it. (a) What is the potential (in kV) near its surface? + 434.42 kv (b) At what distance from its center (in m) is the potential 110 kV? 4.74 m (c) An oxygen atom with three missing electrons is released near the Van de Graaff generator. What is its kinetic energy in keV at the distance found in part (b)? kev