First Law of Thermodynamics Energy is conserved. http://www.cchem.berkeley.edu/~chem130a/sauer/outline/firstlaw.html (Added: Sat Jan 26 2002)
The Second Law of Thermodynamics A general and fun introduction to entropy by Frank L. Colbert at Occidental College.
http://www.secondlaw.com/ (Added: Fri Jun 14 2002)