Which of the following statements are true? A) Mechanical energy is conserved because no dissipative forces perform work on the ball. B) The forces of gravity and the spring have potential energies associated with them. C) No conservative forces act in this problem after the ball is released from the spring gun.

10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 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 energy added you so much!