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Physics and Astronomy Reference
- Air Composition
gas composition of air
- Astro-physical Constants
solar system data, current moon phase, and more ...
- Coefficients of Friction
static and kinetic coefficients of friction for various materials
- Indices of Refraction
index of refraction for various materials
- Decimal Multiples & Prefixes
from a heptillionth to antonplex: decimal multiples, prefixes, symbols and common names
- Fundamental Physical Constants
most commonly used constants in physics and engineering
- Glossary
glossary of physics terms, dictionary of definitions.
- Greek Alphabet
all greek alphabet letter symbols, their names and english equivalents
- Humidex & Windchill Calculator
information on the Humidex and Windchill factors and a conversion calculator.
- Materials Safety Info
MSDS and other chemical materials safety data sheets
- Nobel Prize & Bruce Medal Info
current and past winners of prestigious awards in physics, astronomy, etc.
- Nuclear & Particle Data
electron, proton and neutron data, table of nuclides and more ...
- Periodic Table of Elements
interactive periodic tables of elements, chemical data, etc.
- Special Math Constants
- Archimedes', e - Natural Logarithmic Base, 
- Euler's
- Time Reference & Exact Time
USNO atomic clock current time, worldwide time zones, etc.
- Unit Conversion
conversion of imperial and US units to SI, and physical quantities conversions
