Thermodynamics

study of the movement of heat/energy

http://en.wikipedia.org/wiki/Thermodynamics

http://en.wikipedia.org/wiki/Laws_of_thermodynamics |laws

• 0th - equivalence of equilibrium
• 1st - Conservation Of Energy (You can't win)
• 2nd - Entropy tends to increase (You can't break even)
• 3rd - at Absolute Zero you have zero Entropy (You can't get out of the game)

One of the meta-questions in thermodynamic analysis of any system is definition of its boundaries. Typically this is to try to pretend that what's inside can be Model-led as a Closed System. But really pretty much everything is an Open System.