If you were blindfolded and heard a siren going off and could tell that the pitch was dropping, which way could you safely assume that the siren was moving?
pick all that apply.

a: it's moving towards you

b: it isn't moving at all

c: it's moving away from you

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final