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Eqndb - Search for physics equations and constants by keywords and symbols..

The Laws List - An alphabetical glossary of the various laws and theorems in this science..

The NIST Reference on Constants, Units and Uncertainty - Values recommended for international use by the Committee on Data for Science and Technology, International Council of Science. Navigation is by text search..

Physical Reference Data - Held at NIST Physics Laboratory..

Physics FAQ (Where to Find It) - Links where to find the FAQ documents for physics..

Physics Formulae - A collection of frequently used physics equations compiled into several downloadable formats..