"Energy in the universe is constant and it can't be destroyed or created. [1st Law of Thermodynamics] ...You've got what's you've got. You've got entropy, which is a state of disorder, so things tend [from] order to disorder, but you're not going to destroy [the energy]. • Energy goes from organized and usable to disorganized and unusable, and it seeks equilibrium. That's the 2nd law and discusses entropy, which is just decay and disorder and death and destruction and... all that good stuff! All the happy stuff! When you get to be my age, you kind of look forward to it so it's not necessarily that bad. • Molecular motion stops, as does entropy, at . [3rd law] So when you get to absolute zero... nothing moves, which is why we can't really get there... because... we always take heat out of things by putting it into something else [at a lower temperature]... • Hot goes to cold. (Energy moves from higher temperature to lower temperature.) • High voltage goes to lower voltage. (Electrical current moves from high potential to low potential.) • High pressure goes to low pressure."