Why is it that the receding (contact angle during decrease in volume of droplet) dynamic sessile drop method cannot be used to calculate surface energies, but the advancing (contact angle during increase in volume of droplet) method could?

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!