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Chemistry is the study of matter and energy and the interactions between them. Get facts for the elements in the periodic table. Find chemistry demonstrations and experiments and science fair projects. Get chemistry homework help with worked example ...

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Units of Measurement Converter/Calculator translates value given in one unit system to other systems of measurement. Our converters do their job automatically when you type.

Infoplease.com, a free, authoritative, and respected reference for Internet users, provides a comprehensive encyclopedia, almanac, atlas, dictionary, and thesaurus. Infoplease.com contains facts on all subjects including sports, entertainment, techno...

Sizes of shoes, sheets, mattresses, baseball fields and other objects; grades; indexes (such as body mass index); the metric system and other systems and units of weight, measure and other properties, foreign and domestic, old and new.

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Software, projects, and documents by Stephen Ostermiller.

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Math explained in easy language, plus puzzles, games, quizzes, worksheets and a forum. For K-12 kids, teachers and parents.