:
THE FITNESS SIDE OF SOCIAL DANCING
AND DANCE MIXERS​

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

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

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?