Trusted, Bureaucrats
4,228
edits
Changes
Jump to navigation
Jump to search
Created a table to show the differences between CGS and SI.
The [https://en.wikipedia.org/wiki/International_System_of_Units SI or International System of Units] versus the [https://en.wikipedia.org/wiki/Centimetre%E2%80%93gram%E2%80%93second_system_of_units CGS or Centimetre–gram–second] system of units is a constant source of confusion in the field of NMR. Both are based on the metric system, however the differences can result in quite different forms of the fundamental NMR equations. An example of this is Tesla versus Gauss units for the magnetic field strength.
== Units of measurement ==
{|class="wikitable" style="text-align:center;"
|-
! Quantity
! Symbol
! colspan="3" | SI unit
! colspan="3" | CGS unit
! SI to CGS conversion factor
|-
!
!
! Name
! Symbol
! Base unit
! Name
! Symbol
! Base unit
!
|-
! length
|| ''L''
|style="text-align:left;"| metre
||
|| m
|style="text-align:left;"| centimetre
||
|| cm
|| 10<sup>−2</sup>
|-
! mass
|| ''m''
|style="text-align:left;"| kilogram
||
|| kg
|style="text-align:left;"| gram
||
|| g
|| 10<sup>−3</sup>
|-
! time
|| ''t''
|style="text-align:left;"| second
||
|| s
|style="text-align:left;"| second
||
|| s
|| 1
|-
! velocity
|| ''v''
|style="text-align:left;"| metre per second
||
|| m⋅s<sup>−1</sup>
|style="text-align:left;"| centimetre per second
||
|| cm⋅s<sup>−1</sup>
|| 10<sup>−2</sup>
|-
! acceleration
|| ''a''
|style="text-align:left;"| [https://en.wikipedia.org/wiki/Metre_per_second_squared Metre per second squared]
||
|| m⋅s<sup>−2</sup>
|style="text-align:left;"| [https://en.wikipedia.org/wiki/Gal_%28unit%29 Gal]
|| gal
|| cm⋅s<sup>−2</sup>
|| 10<sup>−2</sup>
|-
! force
|| ''F''
|style="text-align:left;"| [https://en.wikipedia.org/wiki/Newton_%28unit%29 Newton]
|| N
|| kg⋅m⋅s<sup>−2</sup>
|style="text-align:left;"| [https://en.wikipedia.org/wiki/Dyne dyne]
|| dyn
|| g·cm·s<sup>−2</sup>
|| 10<sup>−5</sup>
|-
! energy
|| ''E''
|style="text-align:left;"| [https://en.wikipedia.org/wiki/Joule Joule]
|| J
|| kg⋅m<sup>2</sup>·s<sup>−2</sup>
|style="text-align:left;"| [https://en.wikipedia.org/wiki/Erg erg]
|| erg
|| g·cm<sup>2</sup>·s<sup>2</sup>
|| 10<sup>−7</sup>
|-
! power
|| ''P''
|style="text-align:left;"| [https://en.wikipedia.org/wiki/Watt Watt]
|| W
|| kg⋅m<sup>2</sup>·s<sup>−3</sup>
|style="text-align:left;"| erg per second
|| erg⋅s<sup>−1</sup>
|| g·cm<sup>2</sup>·s<sup>−3</sup>
|| 10<sup>−7</sup>
|-
! magnetic flux density
|| ''B''
|style="text-align:left;"| [https://en.wikipedia.org/wiki/Tesla_%28unit%29 Tesla]
|| T
|| 1 kg·s<sup>−2</sup>·A<sup>−1</sup>
|style="text-align:left;"| [https://en.wikipedia.org/wiki/Gauss_%28unit%29 Gauss]
|| G
|| esu·cm<sup>−2</sup>
|| 10<sup>−4</sup>
|-
! magnetic flux
|| ''H''
|style="text-align:left;"| [https://en.wikipedia.org/wiki/Weber_%28unit%29 Weber]
|| Wb
|| kg·m<sup>2</sup>·s<sup>−2</sup>·A<sup>−1</sup>
|style="text-align:left;"| [https://en.wikipedia.org/wiki/Oersted Oersted]
|| Oe
|| g·cm·s<sup>−2</sup>
|| 1000/4π
|}
