Roxul Industrial Insulation Process - Manual (Page 139)

3.1 Units, conversion factors and tables
3.1.6a SI derived units with special names (European units)
Name Symbol Quantity Unit
Expression in terms
of original SI Units
Plain angle α, β, ... Radian rad
m
(
= 360°
)
m 2π
Solid angle ω Steradian sr
m 2
m 2
Frequency f Hertz Hz
1
s
Force, weight F Newton N
kg ⋅m
s 2
Pressure, stress p Pascal Pa
kg
= N
s 2 ⋅ m m 2
Energy, work, heat E, W Joule J
kg ⋅ m 2
= W ⋅ s = N ⋅ m
s 2
Power, radiant flux P Watt W
kg ⋅ m 2
= N ⋅
m = J = V ⋅ A
s 3 s s
Voltage, electrical potential difference U Volt V
kg ⋅ m 2
= W =
J
s 3 ⋅ A A C
Electric charge or electric flux Q Coulomb C A ⋅ s
Magnetic flux φ Weber Wb
kg ⋅ m 2
= V ⋅ s
s 2 ⋅ A
Electrical resistance R Ohm Ω
kg ⋅ m 2
= V
s 3 ⋅ A 2 A
Electrical conductance G Siemens S
s 3 ⋅ A 2
= 1
kg ⋅ m 2 Ω
Inductance L Henry H
kg ⋅ m 2
= Wb
s 2 ⋅ A 2 A
Electrical capacitance C Farad F
A 2 ⋅ s 4
= C
kg ⋅ m 2 V
Magnetic field B Tesla T
kg
= Wb
s 2 ⋅ A m 2
Celsius-temperature ϑ (or t) degrees Celsius °C
0°C = 273,15 K
1°C = 274,15 K
Luminous flux φ
ν
Lumen lm cd ⋅ sr
Illuminance E
ν
Lux lx
cd ⋅sr = lm
m 2 m 2
Radioactivity
(decays per unit time)
A Becquerel Bq
1
s
Absorbed dose
(of ionizing radiation)
D Gray Gy
J
kg
Equivalent dose
(of ionizing radiation)
H Sievert Sv
J
kg
Catalytic activity z Katal kat
mol
s
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