While a guitar string is vibrating, you gently touch the midpoint of the string to ensure that the string does not vibrate at that point. which normal modes cannot be present on the string while you are touching it in this way?

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!