219 86 Rn —>215 84 Po+a The nuclear equation shows the transmutation of a form of radon into polonium and an alpha particle. In one to two sentences,
explain whether or not the reaction is balanced.

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