Two charges repel each other with a force. If the magnitude of both charges double, but the distance between them remains constant, the force between them will A. Double
B. Triple
C. Quadruple
D. Remain the same

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.

Which of the following are molecules? a. al b. ag c. mgcl2 d. nacl e. c3h8