Machine A and Machine B performed the same amount of work, but Machine A did it in less time. What can be concluded?

A. Machine A used more energy.
B. Machine A and Machine B have the same power output.
C. Machine A has the higher power output.
D. Machine B has the higher power output.

The particles of an ice cube at 0°c (represented by the blue circles) come in contact with the particles of juan’s hand at 37°c (represented by the orange circles). which diagram correctly represents the temperature of the two substances and the direction of heat flow?

Which best represents the law of conservation of mass ?

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