Calculate the kinetic energy of a 45 gram golf ball travelling at 40. m/s.

When an object is heated it contracts. a. true b. false

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.

Positive ions differ from neutral atoms in that