Two metal balls of mass m1 = 3 g (diameter = 3 mm) and m2 = 4 g (diameter = 4 mm) have positive charges of q1 = 4 nC and q2 = 5 nC, respectively. A force holds them in place so that their centers are separated by 8 mm. What will their velocities be after the force is removed and they are separated by a large distance?