What is the scientifi definition of energy?

a. the ability to use the stored potential of an object

b. the ability to use the change in direction of an object

c. the ability to use an applied force in order to make an object move

d. the ability to use the change in temperature of an object

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