Apositron has a mass of 9.11 x 10^-31 kg, and charge qp = +e = +1.60 x 10^-19 c. it is moving towards an α particle (qα = +2e, mα = 6.66 x 10^-27 kg) with a speed of 3.00 x 10^6 m/s. at this instant the separation between the two is 2.00 x 10^-10 m. assume α particle stays at rest. (a) calculate the speed of positron at 1.00 x 10^-10 m from α particle. (b) what is the separation between the two when positron comes to rest?