Water in central texas comes from the edwards
aquifer and tends to be hard. which of the
following would you expect to find in this water?
o a. carbon dioxide
o b. calcium ions
o c. biotic factors
o d. oxygen gas

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!