Identify the circuit for a light fixture controlled by four switches, where flipping one of the switches turns the light on when it is off and turns it off when it is on.

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

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic

Electromagnetic force is present when electromagnetic fields a.become charged as they lose electrons. b.become stable as they come in contact with other forces. c. interact with charged particles. d.gain energy from other forces.