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Astronomical/space constants and equations.
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SCI.SPACE FAQ No. 04 space/math This list was originally compiled by Dale Greer. Additions would be appreciated. Numbers in parentheses are approximations that will serve for most blue-skying purposes. Unix systems provide the units program, useful in converting between different systems (metric/English, CGS/MKS etc NUMBERS...A weekly, scientific reference mailing service. Screens databases covering life and medical sciences for the key words or the combination of key words specified and will automatically update with any abstract that has come up during the last seven days. Free service.
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RefScout Keeps track of your references Would you like to be updated every week on the emerging literature in your field? Simply enter key words, and RefScout® does the work for you! RefScout® is licensee of the National Library of Medicine NLM and will screen MEDLINE...Expanding reference resource for science, math and astronomy
http://www.tcaep.co.uk/
Searchable database for reports that are generated by federally funded projects.
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GrayLIT Network, Full-Text Scientific Report Literature Network makes the gray literature of U.S. Federal Agencies easily accessible over the Internet. It taps into the search engines of distributed gray literature collections, enabling the user to find information without first having to know the sponsoring agency. The...Searchable directory, arranged by field, of equations, constants, symbols and SI units. Also features LaTEX utilities, software links.
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EquationSheet.com Create a personal Equation Sheet from a large database of science and math equations including constants, symbols, and SI units Use or for wildcard character or _ to match any single character Welcome Guest MyEquationSheet Sign In Register Equations Algebra Addition/Subtraction Division/Multiplication Exponents/Powers Logarithms Polynomials Surds Calculus Differentiation/Differentals Integration/Integrals Limits Sequences and Series Chemistry Atomic Structure Electrochemistry Equilibrium Gases, Liquids,...Includes physical constants, online unit conversions, periodic table of elements, exact time, fundamental physical formulae and equations.
http://www.physlink.com/Reference/Index.cfm