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This page lists various constants used in [[physics]] and some useful conversions.
This page lists various '''constants''' used in [[physics]] and some useful conversions.
==Physical constants==
==Physical constants==
|<math>\mu_0</math>
|<math>\mu_0</math>
|<math>4 \pi \times 10^{-7} \, \mathrm{H} \, \mathrm{m^{-1}}</math>
|<math>4 \pi \times 10^{-7} \, \mathrm{H} \, \mathrm{m^{-1}}</math>
|Related to the strength of [[magnetic field]s produced by a [[current]]
|Related to the strength of [[magnetic field]]s produced by a [[current]]
|[[Electromagnetism]]
|[[Electromagnetism]]
|Exact<ref>http://physics.nist.gov/cgi-bin/cuu/Value?mu0</ref>
|Exact<ref>http://physics.nist.gov/cgi-bin/cuu/Value?mu0</ref>
|<math>1.6021766208(98) \times 10^{-19} \, \mathrm{C}</math>
|<math>1.6021766208(98) \times 10^{-19} \, \mathrm{C}</math>
|The magnitude of the electric charge on an electron
|The magnitude of the electric charge on an electron
|Determines the strength of electric and magnetic fields produced by [[proton]]s, [[electron]]s etc
|Determines the strength of electric and magnetic fields produced by [[proton]]s, [[electron]]s etc.
|Inexact<ref>http://physics.nist.gov/cgi-bin/cuu/Value?e</ref>
|Inexact<ref>http://physics.nist.gov/cgi-bin/cuu/Value?e</ref>
|-
|-
|<math>g</math>
|<math>g</math>
|<math>9.80665 \, \mathrm{m} \, \mathrm{s^{-2}}</math>
|<math>9.80665 \, \mathrm{m} \, \mathrm{s^{-2}}</math>
|This is the [[acceleration]] of any object near to the earth's surface when [[gravity]] is the only force acting (ie, no air resistance).
|This is the [[acceleration]] of any object near to the earth's surface when [[gravity]] is the only force acting (i.e., no air resistance).
|[[Mechanics]]
|[[Mechanics]]
|Exact<ref>http://physics.nist.gov/cgi-bin/cuu/Value?gn</ref>
|Exact<ref>http://physics.nist.gov/cgi-bin/cuu/Value?gn</ref>
===Other===
===Other===
Atomic mass unit: 1.00 amu = 1.67 x 10<sup>-27</sup> kg
Atomic mass unit: 1.00 amu = 1.67 x 10<sup>−27</sup> kg
1.000 calorie = 4.184 Joules
1.000 calorie = 4.184 Joules
Standard Temperature and Pressure (STP): temperature = 273 K and pressure = 1.00 atm
Standard Temperature and Pressure (STP): temperature = 273 K and pressure = 1.00 atm
----
Relative [[mass (science)|mass]] and [[charge]] of subatomic particles found in [[atom]]s.
Relative [[mass (science)|mass]] and [[charge]] of subatomic particles found in [[atom]]s.
|Pico
|Pico
|p
|p
|10<sup>-12</sup>
|10<sup>−12</sup>
|-
|-
|nano
|nano
|n
|n
|10<sup>-9</sup>
|10<sup>−9</sup>
|-
|-
|micro
|micro
|μ
|μ
|10<sup>-6</sup>
|10<sup>−6</sup>
|-
|-
|milli
|milli
|m
|m
|10<sup>-3</sup>
|10<sup>−3</sup>
|-
|-
|centi
|centi
|c
|c
|10<sup>-2</sup>
|10<sup>−2</sup>
|-
|-
|deci
|deci
|d
|d
|10<sup>-1</sup>
|10<sup>−1</sup>
|-
|-
|deca
|deca