Explore Science- This site is one of the best we've come across for explaining scientific concepts. Simple Shockwave demos help explain mechanics, life sciences, waves, and more. You'll need the Shockwave plug-in and Netscape 2.0 or better to view the site.
The Internet Plasma Physics Education eXpereince (IPPEX) - Designed for middle school and high school students, this site provides an excellent introduction to plasma physics.
The Internet Pilot to Physics - This site provides links to other physics-related sites, a calendar, and a "Physics Forum." However, it is the "Virtual Laboratory" with Java Applets, VRML, and ShockWave demonstrations and applications that makes this site "cool." Physicist's Encyclopædia Physics FAQ Physics Lecture Demonstrations -If you are interested in physics, this site is a must! From astronomy to magnetism to waves, this site covers it all. Physics News is maintained by the high-energy physics department at Brown University; it contains a neat roundup of the top stories in the field and links to more information. Physics Unbound -An interesting collection of resources. There is information here on classical mechanics, electricity and magnetism, quatum mechanics, and more. PhysLINK - "The Ultimate Physics Resource" Pictures of Famous Physicists Sarfatti's Physics Page Science Channel Some Web Pages About Richard P. Feynman Tesla coil The AIP Center for History of Physics The Bell jar The Dance of Chance The Little Shop of Physics The Net Advance of Physics: The Particle Adventure -What is the world made of? What holds it together? The Particle Adventure tries to answer these questions and more. A great introduction to particle physics. The Physics Lecture Demonstrations' Collection U. of California - Berkeley The Virtual Laboratory A list of physics related Java Applets The Web Surfer's Guide to the Feynman Lectures on Physics The Wonders of Physics The World of Physics Umeets Cosmos Virtual Trips to Black Holes and Neutron Stars WhatsNew Yohkoh Public Outreach Project