Changes between a liquid and gas exsample​

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

Identify the electromagnets with poles that are reversed from the electromagnet shown above

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