- Decimal Multiples & Prefixes
from a heptillionth to antonplex: decimal multiples, prefixes, symbols and common names
- Greek Alphabet
all greek alphabet letter symbols, their names and english equivalents
- Special Math Constants
 - Archimedes', e - Natural Logarithmic Base,  - Euler's
- Fundamental Physical Constants
most commonly used constants in physics and engineering
- Astro-physical Constants
solar system data, current moon phase, and more ...
- Nuclear & Particle Data
electron, proton and neutron data, table of nuclides and more ...
- Air Composition
gas composition of air
- Coefficients of Friction
static and kinetic coefficients of friction for various materials
- Online Unit Conversion
conversion of imperial and US units to SI, and physical quantities conversions
- Equations of Physics & Math
download sheets of equations, from simple math to complicated quantum relativity
- Glossary
glossary of physics terms, dictionary of definitions.
- Online Periodic Table
interactive periodic tables of elements, chemical data, etc.
- Materials Safety Info
MSDS and other chemical materials safety data sheets
- The Nobel Prize & Bruce Medal Info
current and past winners of prestigious awards in physics, astronomy, etc.
- Exact Time
USNO atomic clock current time, worldwide time zones, etc.
- Reference for Educators and Students
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- Humidex & Windchill Calculator
information on the Humidex and Windchill factors and a conversion calculator.
- Other
miscellaneous science reference resources on the web
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| Physical Constants |
Atomic mass unit:
u = 1.66054 x 10-27 kg
Electron mass:
me = 9.10938 x 10-31 kg
Elementary charge:
e = 1.602177 x 10-19 C
Speed of light in vacuum:
c = 2.99792458 108 m/s
more constants ...
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| Astro-physical Data |
astronomy data ...
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| Periodic Table of Elements |
chemical element data ...
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| Unit Conversion |
1 in = 2.54 cm = 0.0254 m
1 ft = 30.48 cm = 0.3048 m
1 mile = 1.6093 km= 1609.3 m
1 lb = 0.4536 kg = 453.6 g
more units ...
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