c) Find the new stored energy. 4) Protons are released from rest in a Van de Graaff accelerating system. The protons initially are located where the electric potential has a value of 5.00 MV and then they travel through a vacuum to a region where the potential is zero. a) Find the final seed of these protons. b) Find the accelerating electric field strength if the potential changed uniformly over a distance of 2.00 m