Two insulating spheres have radii R1 and R2, masses m1 and m2, and uniformly distributed charges −Q1 and Q2. They are released from rest when their centres are separated by a distance d. a) How fast is each moving when they collide? b) If the spheres were conductors, would their speeds be greater or less than those calculated in part a)? Why

Two insulating spheres have radii R1 and R2, masses m1 and m2, and uniformly distributed charges −Q1 and Q2. They are released from rest when their centres are separated by a distance d. a) How fast is each moving when they collide? b) If the spheres were conductors, would their speeds be greater or less than those calculated in part a)? Why