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Astronomy - Standard
Planetary Information, Formulas and Constants
Chemistry - Common
Elements Alphabetically - from Chemtutor
Chemists' & Chemical Engineers' Toolbox - from Swain Chemistry and Engineering Library
Chemistry - Periodic
Tables of the WWW
Chemistry: Material Safety Data Sheets Databases from Sigma-Aldrich
Constants - Table of Constants - from area48central
Constants table with 50 decimal places
Constants - Fundamental Physical Ones
Conversion Online
Constants
and Conversion Factors Useful in Nanotechnology
Conversion of Units
Cryptography - Ritter’s
Crypto Glossary and Dictionary of Technical Cryptography
Engineering
Formulas
Graphs and Charts Gallery - from Boris Pevzner
Grit Size Conversion Chart
Heat - Steam - Superheated
Steam Properties
Heat - Temperature Dependant Elastic and Thermal Properties Database
Mathematics
Tables and Formulas
Math - Tables of Constants - from Plouffe's Inverter
Scales - Moh’s
Hardness Scale
Sizes of all kinds of things
Time - Coordinated Universal Conversions
S. C. Phillips Unit Conversion Factors
Unit Conversion Organization
Unit Juggler - convert everything with ease
Wire
Gauge Size Conversions
Wire - Metric
to AWG Conversion Table
Wire
Gauge Calculations
Wood
Strength Table
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