Conversion Tables And Abbreviations Chart
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425.1 Technical Units
25 Conversion Tables and Abbreviations
25.1 Technical Units of the
Système International
Relevant to Wheat Science
and Technology
The International System of Units, abbreviated
Tab. 149: SI base units
SI (from the French Le Système International
Base quantity
Name
Symbol
d'Unités), represents the metric system of
Length
meter
m
measurement. The SI was established in 1960
th
by the 11
General Conference on Weights and
kilogram a
Mass
kg
Measures (CGPM, Conférence Générale des
Time
second
s
Poids et Mesures). The CGPM is the internation-
403
al authority that ensures wide dissemination
Electric current
ampere
A
of the SI and modifies the SI as necessary to
Thermodynamic temperature
kelvin
K
reflect the latest advances in science and
Amount of substance
mole
mol
technology (NIST, 2005). The following tables
have been selected and modified to suit
a The kilogram is the only SI unit with a prefix
as part of its name and symbol.
the needs of millers, bakers and other cereal
technologists.
Tab. 150: SI derived units with special names and symbols
Derived quantity
Name
Symbol
Expression in terms
Expression in terms
of other SI units
of SI base units
s -1
Frequency
hertz
Hz
-
m·kg·s -2
Force
newton
N
-
N/m 2
m -1 ·kg·s -2
Pressure, stress
pascal
Pa
m 2 ·kg·s -2
Energy, work, quantity of heat
joule
J
N·m
m 2 ·kg·s -3
Power, radiant flux
watt
W
J/s
Electric charge, quantity of electricity
coulomb
C
-
s·A
m2·kg·s -3 ·A -1
Electric potential difference, electromotive force volt
V
W/A
m -2 ·kg -1 ·s 4 ·A 2
Capacitance
farad
F
C/V
m 2 ·kg·s -3 ·A -2
Electric resistance
ohm
w
V/A
Celsius temperature
degree Celsius
°C
-
K
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Parent category: Life