Fill in the blank: energy can never be created nor destroyed just _ or _

If a balloon is taken outside on a very cold day, what will occur?

What is the measurement of how fast an object moves relative to a reference point?

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 equation2: 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!