Two identical conducting spheres are charged with a net charge of +5.0 q on the first sphere and a net charge of ‐8.0 q on the second sphere. The spheres are brought together, allowed to touch, and then separated.  What is the net charge on each sphere now?

6. Shown below is a small sphere of mass 0.25 g that carries charge of 0.90 nC. The sphere is attached to one end of a very thin silk string 5.0 cm long. The other end of the string is attached to a large, thin, vertical conducting plate with surface charge density of 30.0 µC/m². When another thin vertical large plate with uniformly distributed negative charge is brought close to the small sphere (but not touching), 0 increases for additional 5.00°. Determine the surface charge density on the negative plate. + + + + + + + + + + + + + + + +

Two point charges are located 2.5 mm apart. The force between the particles has a negative magnitude of 4.0N. If the two point charges are moved 5.0 mm apart and everything remains the same, the new face between the charges will have a magnitude of?  I know the answer is 1.0 N but how?

A small glass bead charged to 4.5 nC is in the plane that bisects a thin, uniformly charged, 10-cm-long glass rod and is 4.0 cm from the rod's center. The bead is repelled from the rod with a force of 740 μN. What is the total charge of the rod?