Earth has a mass of 5,970,000,000,000,000,000,000,000 kg. How would scientists express this number in scientific notation?
A. 5.97 x 1022 kg
B. 59.7 x 1023 kg
C. 5.9724 kg
D. 5.97 x 1024 kg

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!