Is the momentum of the system of three spheres conserved in these collisions? Choose the correct explanation. View Available Hint(s) Is the momentum of the system of three spheres conserved in these collisions? Choose the correct explanation. No, because the force that one sphere exerts on another acts like an external force for the second sphere. No, because a part of the kinetic energy of the spheres transforms into thermal energy (heat) during the collisions. Yes, because the momentum of any system is always conserved. Yes, because no external forces act on the system during both collisions. It cannot be stated without additional information.