How does peer review affect research

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?

In a heat engine of 1000 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 inital energy was 2000 j we have to do all of these down here 1)write the equation 2)list out your know variables 3)plug the numbers into the equations 4)solve 5)write your solution statemtn that includes inital energuy and final energuy added

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years