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
  
• Decimal Multiples & Prefixes
  from a heptillionth to antonplex: decimal multiples, prefixes, symbols and common names
  
• Equations of Physics & Math
  download sheets of equations, from simple math to complicated quantum relativity
  
• 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
  
• Other
  miscellaneous science reference resources on the web