An a particle fired head-on at a stationary nickel nucleus approaches to a radius of 25 fm before being turned around. What is the maximum Coulomb force exerted on the a particle? Express your answer using two significant figures. F = ΜΕ ΑΣΦ Submit Request Answer Part B ? N What is the electric potential energy of the a particle at its point of closest approach? Express your answer using two significant figures. U = ΕΠΙ ΑΣΦ Submit Request Answer Part C Find the initial kinetic energy of the a particle. Express your answer using two significant figures. ΕΠΙ ΑΣΦ K = ? ? MeV MeV