| Ask the Experts Answers to physics questions at Scientific American. |
| Eric Weisstein's Treasure Trove of Physics Online encyclopedia of physics terms and formulas. Full searchable, and also browsable alphabetically and by topic. Part of Eric's Treasure Troves of Science. |
| Physics and Astronomy Classification Scheme (PACS) Hierarchical numbering scheme, developed by the American Institute of Physics, used to identify fields and sub-fields of physics. |
| Physics Central Find out how physics is part of your world. We answer your questions on how things work and keep you informed with daily updates on physics in the news. We describe the latest research and the people who are doing it and show you physics in action. |
| Physics Central A page on modern physics, such as quantum mechanics and black holes, and some mathematics. |
| Physics News Graphics Diagrams (with captions) appearing in various AIP publications, sorted by category or by date. |
| Physics on MathPages Articles, leaning towards a mathematical description, on a wide range of topics in physics. |
| Physics Post A tutorial and article driven community. Votes, science news and a discussion forum. |
| Physics Today The flagship publication of the American Institute of Physics (AIP). Provides feature articles, news stories, analyses, book and product reviews, a searchable job database, and obituaries. |
| Physics.org Searchable database of physics resources from the Institute of Physics which matches a person's question, age and knowledge profile to handpicked sites. Also includes the Physics Life animation. |