9. Two identical conducting small spheres are placed with their
centers 0.300 m apart. One is given a charge of 12.0 nC
and the other a charge of "18.0 nC. (a) Find the electric
force exerted by one sphere on the other. (b) What If?
The spheres are connected by a conducting wire. Find
the electric force between the two after they have come to
equilibrium.
10. Two small beads having positive charges 3q and q are fixed
at the opposite ends of a horizontal, insulating rod, extending
from the origin to the point x ! d. As shown in
Figure P23.10, a third small charged bead is free to slide
on the rod. At what position is the third bead in equilibrium?
Can it be in stable equilibrium?