We have two thin concentric conducting spherical shells. There is a charge Q on the inner shell (with radius a) and a charge -Q on the outer shell (with radius b). Find Va-Vb, the difference in potential on the surfaces of the two spheres.

How are series and parallel circuits simililar? both have multiple paths for electrons to travel. both require resistors in their circuits. both require a switch to complete the circuit. both have at least one path for electrons to travel.

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

If element x has 99 protons how many electrons does it have