Visual Dictionary
Virtual Human Body
InSight
Mobile Applications
MerriamWebster The Visual + (iPad)
Virtual Human Body (iPad/iPhone/iPod/Android)
Visuel mobile (iPhone/iPod)
Zook Discovers the Seasons (iPad)
Online store
Language:
English
French
Spanish
Look up an image:
Search
Explore by theme
About the Visual
Books
Games
HOME
>
science
>
scientific symbols
>
international system of units
international system of units
Decimal system established by the 11th General Conference on Weights and Measures (GCWM) in 1960 and used by many countries.
See international system of units in :
french

spanish
measurement of electric resistance
multimeter
measurement of electric potential difference
multimeter
measurement of luminous intensity
measurement of power
measurement of energy
measurement of electric current
multimeter
measurement of electric charge
measurement of frequency
volt
Difference in potential between two points of a conductor carrying a constant current of 1 ampere when the power between these points is 1 watt.
ohm
Electrical resistance between two points of a conductor carrying a current of 1 ampere when the difference in potential between them is 1 volt.
candela
Unit of light intensity equivalent to a radiant intensity of 1/683 watts per steradian (solid angle).
coulomb
Amount of electricity carried in 1 second by a current of 1 ampere.
joule
Amount of energy released by the force of 1 newton acting through a distance of 1 meter.
watt
Energy transfer of 1 joule during 1 second.
hertz
Frequency of a periodic phenomenon whose period is 1 second.
ampere
Constant current of 1 joule per second in a conductor.