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Eqndb
Search for physics equations and constants by keywords and symbols.
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.
The Laws List
An alphabetical glossary of the various laws and theorems in this science.
The NIST Reference on Constants, Units and Uncerta
Values recommended for international use by the Committee on Data for Science and Technology, International Council of Science. Navigation is by text search.
The Physics Reference
Site contains every formula a first-year physics student is likely to run into.