A linear particle accelerator launches a proton (charge + e) directly against a target at rest which is a helium nucleus (charge + 2e) the initial velocity of the proton is 1606 km / s with respect to the ground and distance initial between the particles is very large its electrical interaction start moment can be considered null the helium nucleus always remains at rest a) Calculate the minimum separation between the particles just before they start to separate again b) calculate the maximum value of the acceleration of the proton in its interaction with the helium nucleus