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Periodic chart that includes many details about the elements, along with pictures and histories. The professional edition includes more nitty-gritty details. Maintained by Mark Winter of the University of Sheffield in England.

The Laws List
Clear explanations of many of the laws, rules, principles, effects, paradoxes, limits, constants, experiments, and thought experiments of physics. Maintained by programmer Erik Max Francis.

Physical Constants

List of Internationally recommended values for fundamental physical constants like the speed of light. Maintained by The U.S. National Institute of Standards and Technology (NIST).


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