Permafrost thaws only briefly in the summer. t o f brainliest

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!

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.