Two otherwise identical conducting spheres carry charges of + 5.0 C and 1.0 C. They are initially

Two otherwise identical conducting spheres carry charges of + 5.0 μC and −1.0 μC. They are initially a large distance L apart. The spheres are brought together, touched together, and then returned to their original separation L. What is the ratio of the magnitude of the force on either sphere after they are touched to that before they were touched?