Is "the heat of a substance is the measure of the average kinetic energy of the molecules of a system" true or flase

The nuclear fission process releases neutrons and question 27 options: alpha particles electrons energy beta particles

Why are people not able to skip a dive to the deepest part of the ocean

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