What the hell are asking people on "Physics" right now?
Very good sites about the physical properties, phenomena, and laws of nature.
This site is crammed full of tables of data, formulae, graphs and charts reviewed and updated to reflect advances and developments in the fields of physics and chemistry.
Your guide to physics on the web. Physics.org is the place to be if you have a burning physics question, or if you just want to browse articles and interactive features about physics.
Your Math and Physics Questions Answered. Send your questions about math, physics, or anything else you can think of.
Information about and links to a wide range of materials for teachers in the physical sciences, including curriculum and lesson plans, laboratories, lecture demonstration materials, reference...
A blog about nuclear secrecy, past and present, run by Alex Wellerstein, an historian of science at the American Institute of Physics.