What muscle brings the shoulders and arm backwards

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

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!

If the specific heat of a metal is 0.850 j/g °c, what is its atomic weight?