Willing to give a brainliest!

which occurred before nucleosynthesis began? check all that apply.

universe became transparent
quarks started to form
inflationary expansion occurred
electrons started to form
stars were born

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!