SI Dimensions of Physical Quantities Alphabetic List
SI Dimensions of Physical Quantities Alphabetic List
Contact:
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|
1.
|
Abbé number | Constringence | V-number |
1 |
Dimensionless |
VD = (nD-1)/(nF-nC)
|
|
2.
|
Absorbed radiation
dose |
m2.s-2 |
J.kg-1, Gy (gray) |
[Energy]/[Mass] |
|
3.
|
Absorbed dose
rate |
m2.s-3 |
Gy.s-1 |
[Absorbed dose]/[Time] |
|
4.
|
Acceleration,
angular |
s-2 |
rad.s-2 |
[ΔAngular velocity]/[ΔTime] |
|
5.
|
Acceleration
| Deceleration |
m.s-2 |
|
[ΔVelocity]/[ΔTime] |
|
6.
|
Acoustic impedance /
resistance / reactance |
kg.m-4.s-1
|
Pa.s/m3, reyl/m2 |
[Pressure]/[Volume flow rate] |
|
7.
|
Acoustic
impedance, specific |
kg.m-2.s-1
|
Pa.s/m , reyl |
[ΔPressure]*[Velocity]. Also s.acu. resistance / reactance |
|
8.
|
Acoustic conductance,
specific |
kg-1.m2.s |
reyl-1 |
Inverse of s.acu. impedance. Also s.acu. susceptance |
|
9.
|
Action |
kg.m2.s-1 |
J.s |
[Energy]*[Time], [Moment of motion]*[Distance]
|
|
10.
|
Activity of a
radioactive source |
s-1 |
Bq (becquerel) |
[Counts]/[Time] |
|
11.
|
Activity,
katalytic |
mol.s-1 |
katal |
[ΔQuantity]/[Time]. Same as molar production rate |
|
12.
|
Activity,
transactions rate |
s-1 |
1/year |
[Transactions]/[Time period]. Economy and
finance |
|
13.
|
Admittance,
inductive |
kg-1.m- 2.s3.A2 |
S (siemens) |
1/[Inductive impedance] |
|
14.
|
Admittance,
of a circuit |
kg-1.m- 2.s3.A2 |
S (siemens) |
1/[Circuit impedance] |
|
15.
|
Advection
velocity |
m.s-1 |
m/s |
In porous
media; actual progress along pressure gradient |
|
16.
|
Albedo, of a surface |
1 |
Dimensionless |
[Reflected
elmag power]/[Incident elmag power] |
|
17.
|
Amplification
| Attenuation (generic) |
1 |
usually in dB |
[Quantity(p)]/[Quantity(p')],
with p being some parameter |
|
18.
|
Angular acceleration |
s-2 |
rad.s-2 |
[ΔAngular
velocity]/[ΔTime] |
|
19.
|
Angular moment of inertia |
kg.m2 |
|
[Mass]*[Distance2]
|
|
20.
|
Angular moment of motion |
kg.m2.s-1 |
J.s |
[Moment of
motion]*[Distance]. Like [action]
|
|
21.
|
Angular velocity |
s-1 |
rad.s-1 |
[ΔPlane angle]/[ΔTime]
|
|
22.
|
Annealing point |
K |
|
Temperature at which viscosity drops below 1012
Pa.s |
|
23.
|
Area |
m2 |
|
[Distance]*[Distance]
|
|
24.
|
Area
growth rate |
m2.s-1 |
|
[ΔArea]/[Time] |
|
25.
|
Asset
| Wealth |
cur |
currency |
Economy and finance |
|
26.
|
Atomic
number |
1 |
Dimensionless |
Number of protons in an
atomic nucleus |
|
27.
|
Atomic
weight | Relative atomic mass |
au |
atomic units |
Average over a typical
isotopic composition |
|
28.
|
Attenuation
| Amplification
(generic) |
1 |
usually in dB |
[Quantity(p)]/[Quantity(p')],
with p being some parameter |
|
29.
|
Attenuation
/ amplification over a distance |
m-1 |
dB/m |
[Attenuation]/[Distance].
Mostly in acoustic and electronics |
|
30.
|
Attenuation
/ amplification over a period |
s-1 |
dB/s |
[Attenuation]/[Time].
Mostly in acoustic and electronics |
|
31.
|
Albedo, of a surface |
1 |
Dimensionless |
[Reflected
elmag power]/[Incident elmag power] |
|
32.
|
Amplification
| Attenuation (generic) |
1 |
usually in dB |
[Quantity(p)]/[Quantity(p')],
with p being some parameter |
|
33.
|
Angular acceleration |
s-2 |
rad.s-2 |
[ΔAngular
velocity]/[ΔTime] |
|
34.
|
Angular moment of inertia |
kg.m2 |
|
[Mass]*[Distance2]
|
|
35.
|
Angular moment of motion |
kg.m2.s-1 |
J.s |
[Moment of
motion]*[Distance]. Like [action]
|
|
36.
|
Angular velocity |
s-1 |
rad.s-1 |
[ΔPlane angle]/[ΔTime]
|
|
37.
|
Annealing point |
K |
|
Temperature at which viscosity drops below 1012
Pa.s |
|
38.
|
Area |
m2 |
|
[Distance]*[Distance]
|
|
39.
|
Area
growth rate |
m2.s-1 |
|
[ΔArea]/[Time] |
|
40.
|
Asset
| Wealth |
cur |
currency |
Economy and finance |
|
41.
|
Atomic
number |
1 |
Dimensionless |
Number of protons in an
atomic nucleus |
|
42.
|
Atomic
weight | Relative atomic mass |
au |
atomic units |
Average over a typical
isotopic composition |
|
43.
|
Attenuation
| Amplification
(generic) |
1 |
usually in dB |
[Quantity(p)]/[Quantity(p')],
with p being some parameter |
|
44.
|
Attenuation
/ amplification over a distance |
m-1 |
dB/m |
[Attenuation]/[Distance].
Mostly in acoustic and electronics |
|
45.
|
Attenuation
/ amplification over a period |
s-1 |
dB/s |
[Attenuation]/[Time].
Mostly in acoustic and electronics |
|
46.
|
Bandwidth |
s-1 |
Hz |
[ΔFrequency] |
|
47.
|
Baud
rate | Information flux |
bit.s-1 |
baud |
[Information]/[Time]
|
|
48.
|
Bond
duration |
s |
year |
Economy and finance |
|
49.
|
Bulk
modulus |
kg.m-1.s-2 |
N.m-2, Pa |
([ΔVolume]/[Volume])/[Pressure].
Inverse of compressibility |
|
50.
|
Capacitance,
electric |
kg-1.m- 2.s4.A2 |
C.V-1, F
(farad) |
[Charge]/[ΔPotential]
|
|
51.
|
Capacitive
reactance |
kg.m2.s-3.A-2 |
Ω (ohm)
|
1/(i[Angular
frequency].[Capacitance]) |
|
52.
|
Capacitive
susceptance |
kg-1.m- 2.s3.A2 |
S
(siemens) |
1/[Capacitive reactance]
|
|
53.
|
Cash flow |
cur.s-1 |
currency/year |
[Value]/[ΔTime]. Economy
and finance |
|
54.
|
Circulation |
m2.s-1 |
J.s.kg-1 |
[Angular moment]/[Mass],
[Velocity]*[Loop length] |
|
55.
|
Characteristic
impedance |
kg.m2.s-3.A-2 |
V.A-1, Ω, ohm
|
√([Mag.Permeability]/[El.Permittivity])
|
|
56.
|
Charge,
electric |
s .A |
C
(coulomb) |
[Current]*[Time] |
|
57.
|
Charge,
magnetic (bound)
|
m-2.A |
|
- |
|
58.
|
Charge,
quantum |
1 |
Dimensionless |
[Charge]/[Elementary
charge quantum] |
|
59.
|
Charge,
molecular/ionic, quantum |
1 |
Dimensionless |
[Charge of a molecule or
ion]/[Elementary charge quantum] |
|
60.
|
Charge density |
m-3.s.A |
C.m-3 |
[Charge]/[Volume] |
|
61.
|
Charge/mass ratio | Specific charge |
kg-1.s.A |
C.kg-1 |
[Charge]/[Mass] |
|
62.
|
Charge, molar |
s.A.mol-1 |
C.mol-1 |
[Charge]/[Quantity] |
|
63.
|
Chemical potential, molar |
kg.m2.s-2.mol-1 |
J.mol-1 |
[ΔInternalEnergy]/[ΔQuantity] |
|
64.
|
Circuit admittance |
kg-1.m- 2.s3.A2 |
S
(siemens) |
1/[Circuit impedance] |
|
65.
|
Circuit impedance |
kg.m2.s-3.A-2 |
Ω (ohm)
|
|
|
66.
|
Circulation / velocity of money |
s-1 |
1/year |
[Transactions]/[Time period]. Economy and
finance |
|
67.
|
Circumference | Perimeter |
m |
|
|
|
68.
|
Collision cross section | Cross section |
m2 |
|
[Distance]*[Distance] |
|
69.
|
Compressibility |
kg-1.m.s2 |
Pa-1 |
[Pressure]/([ΔVolume]/[Volume]). Inverse of bulk modulus |
|
70.
|
Compression |
kg.m-1.s-2 |
N.m-2, Pa (pascal) |
[Force]/[Area]. Same as pressure |
|
71.
|
Compression
factor of a real
gas |
1 |
Dimensionless |
pV/(nRT). For ideal gas equals 1; temperature dependent
|
|
72.
|
Compressive
strength |
kg.m-1.s-2 |
N.m-2, Pa |
[Force]/[Area]. Like pressure |
|
73.
|
Concentration,
molar |
m-3.mol |
|
[Quantity]/[Volume]. Same as molar density |
|
74.
|
Concentration
gradient, molar |
m-4.mol |
|
[Molarity]/[Distance]. Same as molarity gradient |
|
75.
|
Concentration
ratio, molar |
1 |
Dimensionless |
[Partial quantity]/[Total quantity] |
|
76.
|
Concentration
ratio, by mass |
1 |
Dimensionless |
[Partial mass]/[Total mass] |
|
77.
|
Concentration
ratio, by volume |
1 |
Dimensionless |
[Partial volume]/[Total volume]. . |
|
78.
|
Concentration,
by weight (obsolete)
|
1 |
Dimensionless |
[Partial mass]/[Total mass]. Obsolete: use by mass |
|
79.
|
Conductance,
electric |
kg-1.m- 2.s3.A2 |
A.V-1, S (siemens) |
1/[Resistance] |
|
80.
|
Conductivity,
electric |
kg-1.m- 3.s3.A2 |
S.m-1 |
1/[Resistivity] |
|
81.
|
Conductivity,
hydraulic |
m.s-1 |
m/s |
Used for porous
media |
|
82.
|
Conductivity,
molar |
kg- 1.s3.A2.mol-1 |
S.m2.mol-1 |
[El.conductivity]/[Concentration] |
|
83.
|
Conductivity,
thermal |
kg.m.s-3.K-1 |
W.m-1.K-1 |
[Heat flux]/([Distance]*[ΔTemperature]) |
|
84.
|
Constringence | Abbé
number | V-number |
1 |
Dimensionless |
VD = (nD-1)/(nF-nC)
|
|
85.
|
Convergence |
m-1 |
dioptry |
in optics, but not only |
|
86.
|
Cosmological
constant Λ |
m-2 |
|
Present in Einstein's equation |
|
87.
|
Cosmological
expansion rate |
s-1 |
km/s/Mpc |
[Velocity]/[Distance]. Mpc stands for Megaparsec |
|
88.
|
Count
of events/instances |
1 |
|
This covers all kinds of enumerations |
|
89.
|
Count
rate |
s-1 |
|
[Counts]/[Time] |
|
90.
|
Couple |
kg.m2.s-2 |
N.m |
2*[Force]*[Distance] for two non-aligned
opposing forces |
|
91.
|
Critical
angle of repose |
rad |
or degree |
Steepest angle of a slope before a slide |
|
92.
|
Cross
section |
m2 |
|
[Distance]*[Distance] |
|
93.
|
Cryoscopic
constant |
kg.mol-1.K |
K/(mol/kg) |
[ΔTemperature]/[Molality] |
|
94.
|
Current,
electric |
A |
A
(ampere) |
|
|
95.
|
Current
density, electric |
m-2.A |
|
[Current]/[Area]. Same as current intensity |
|
96.
|
Current
intensity, electric |
m-2.A |
|
[Current]/[Area]. Same as current density |
|
97.
|
Current
noise, variance nJ2 |
s.A2 |
A2/Hz |
[Current]2/[Bandwidth] |
|
98.
|
Curvature |
m-1 |
|
1/[Curvature radius] |
|
99.
|
Curvature radius |
m |
|
of a line in plane/space
or surface in space |
|
100.
|
D'Alembert
operator | D'Alembertian |
m-2 |
|
(1/c2)∂2/∂t2 - ∂2/∂x2 - ∂2/∂y2 - ∂2/∂z2 |
|
101.
|
Debt |
Liability |
cur |
currency |
Economy and finance |
|
102.
|
Debt/GDP
ratio |
s |
year |
[Debt]/[Earnings]. Economy and finance |
|
103.
|
Deceleration
| Acceleration |
m.s-2 |
|
[ΔVelocity]/[ΔTime] |
|
104.
|
Deceleration,
angular |
s-2 |
rad.s-2 |
[ΔAngular velocity]/[ΔTime] |
|
105.
|
Density
of electric charge |
m-3.s.A |
C.m-3 |
[Charge]/[Volume] |
|
106.
|
Density
of electric current |
m-2.A |
|
[Current]/[Area]. Same as current intensity |
|
107.
|
Density
of energy |
kg.m-1.s-2 |
J.m-3 |
[Energy]/[Volume] |
|
108.
|
Density
of mass |
kg.m-3 |
|
[Mass]/[Volume]. Same as specific density |
|
109.
|
Density
of mass, gradient of |
kg.m-4 |
|
[Mass density]/[Distance]. Same as specific density gradient |
|
110.
|
Density
of particles |
m-3 |
|
[Count]/[Volume]. Obsolete: number density |
|
111.
|
Density
of substance |
m-3.mol |
|
[Quantity]/[Volume]. Same as molar concentration |
|
112.
|
Derivative with respect to time |
s-1 |
|
d/dt,
∂/∂t |
|
113.
|
Derivative with respect to a length |
m-1 |
|
d/dr,
∂/∂r, r = x | y | z |
|
114.
|
Dielectric
constant | Relative permittivity |
1 |
Dimensionless |
[Permittivity]/[Permittivity of vacuum] |
|
115.
|
Dielectric strength/rigidity | Electric strength |
kg.m.s-3.A-1 |
V.m-1 |
[ΔPotential]/[Distance] |
|
116.
|
Diffusion coefficient |
m2.s-1 |
|
[Distance]2/[Time]
|
|
117.
|
Diffusivity, thermal |
m2.s-1 |
|
([∂Temperatute]/[∂Time])/ |
|
118.
|
Dipole moment, electric |
m.s.A |
C.m |
[Charge]*[Distance] |
|
119.
|
Dipole moment, magnetic |
m2.A |
J.T-1 |
[Current]*[Area] |
|
120.
|
Dispersive power |
1 |
Dimensionless |
Ratio of differences of
refractive indices |
|
121.
|
Dispersivity quotient |
m-1 |
|
[ΔRefractive
index]/[ΔWavelength] |
|
122.
|
Displacement, electric |
m-2.s.A |
C.m-2 |
[Charge]/[Area]. Same as electric flux density |
|
123.
|
Displacement four-tensor (relativistic Dμν)
|
m-1.A |
|
Like magnetic intensity |
|
124.
|
Distance |
m |
|
in all Euclidean
n-dimensional spaces |
|
125.
|
Dose of absorbed radiation |
m2.s-2 |
J.kg-1, Gy
(gray) |
[Energy]/[Mass] |
|
126.
|
Dose rate |
m2.s-3 |
Gy.s-1 |
[Absorbed dose]/[Time]
|
|
127.
|
Drift speed |
m.s-1 |
|
Steady-state speed of an
object. . |
|
128.
|
Duration |
s |
s
(second) |
|
|
129.
|
Dynamic viscosity |
kg.m-1.s-1 |
Pa.s |
([Force]/[Area])/[ΔVelocity]
|
|
130.
|
Earnings | Income rate |
cur.s-1 |
currency/year |
[Value]/[Time period].
Economy and finance |
|
131.
|
Ebullioscopic constant |
kg.mol-1.K |
K/(mol/kg) |
[ΔTemperature]/[Molality]
|
|
132.
|
Electric capacitance |
kg-1.m- 2.s4.A2 |
C.V-1, F
(farad) |
[Charge]/[ΔPotential]
|
|
133.
|
Electric charge |
s .A |
C
(coulomb) |
[Current]*[Time] |
|
134.
|
Electric conductance |
kg-1.m- 2.s3.A2 |
A.V-1,
S
(siemens) |
[Current]/[ΔPotential].
Inverse of resistance |
|
135.
|
Electric conductivity |
kg-1.m- 3.s3.A2 |
S.m-1 |
1/[Resistivity] |
|
136.
|
Electric conductivity, molar |
kg- 1.s3.A2.mol-1 |
S.m2.mol-1 |
[El.conductivity]/[Concentration]
|
|
137.
|
Electric current |
A |
A
(ampere) |
|
|
138.
|
Electric dipole moment |
m.s.A |
C.m |
[Charge]*[Distance] |
|
139.
|
Electric displacement |
m-2.s.A |
C.m-2 |
[Charge]/[Area]. Same as electric flux density |
|
140.
|
Electric field strength | Electric intensity |
kg.m.s-3.A-1 |
V.m-1 |
[ΔPotential]/[Distance]
|
|
141.
|
Electric field gradient |
kg.s-3.A-1 |
V.m-2 |
[ΔEl.field
strength]/[Distance] |
|
142.
|
Electric flux density | Electric induction |
m-2.s.A |
C.m-2 |
[Charge]/[Area] |
|
143.
|
Electric inductance |
kg.m2.s-2.A-2 |
V.s.A-1, H
(henry) |
[ΔPotential]/[dCurrent/dt]
|
|
144.
|
Electric
induction |
m-2.s.A |
C.m-2 |
[Charge]/[Area]. More
properly electric flux density
|
|
145.
|
Electric
intensity |
kg.m.s-3.A-1 |
V.m-1 |
[ΔPotential]/[Distance].
More properly electric field strength
|
|
146.
|
Electric
permittivity |
kg-1.m- 3.s4.A2 |
F.m-1 |
[El.flux density]/[El.field
strength] |
|
147.
|
Electric
permittivity, relative |
1 |
Dimensionless |
[Permittivity]/[Permittivity
of vacuum]. Same as dielectric
constant |
|
148.
|
Electric
polarization |
m-2.s.A |
C.m-2 |
[Charge]/[Area]. Like electric flux density |
|
149.
|
Electric
potential |
kg.m2.s-3.A-1 |
W.A-1, J.C-1, V (volt) |
[Power]/[Current],
[Energy]/[Charge] |
|
150.
|
Electric
quadrupole moment |
m2.s.A |
C.m2 |
[Electric
dipole]*[Distance], [Electric charge]*[Distance2] |
|
151.
|
Electric
resistance |
kg.m2.s-3.A-2 |
V.A-1, Ω (ohm)
|
[ΔPotential]/[Current]
|
|
152.
|
Electric
resistivity |
kg.m3.s-3.A-2 |
Ω.m |
([Resistance]*[Length])/[Area]
|
|
153.
|
Electric
strength | Dielectric strength |
kg.m.s-3.A-1 |
V.m-1 |
[ΔPotential]/[Distance].
. |
|
154.
|
Electromagnetic
field tensor (relativistic Fμν) |
kg.s-2.A-1 |
T |
Like magnetic flux density |
|
155.
|
Electromagnetic
displacement (relat. Dμν) |
m-1.A |
|
Like magnetic intensity |
|
156.
|
Electromagnetic
four-current (relativistic Jα) |
m-2.A |
|
Like current density and [Charge]*[c] |
|
157.
|
Electromagnetic
four-potential (relativistic Aα) |
kg.m.s-2.A-1 |
m-1.s.V, m.T |
Like magnetic vector potential and [El.potential]/[c] |
|
158.
|
Electromotive
force (emf) |
kg.m2.s-3.A-1 |
V |
[ΔPotential] |
|
159.
|
Electron
affinity (always molar) |
kg.m2.s-2.mol-1 |
J.mol-1 |
Energy released binding
an electron |
|
160.
|
Electronegativity,
Pauling χ |
1 |
Dimensionless |
Relative tendency of an atom to attract
electrons; χ(H)=2.20. |
|
161.
|
Electrostriction
coefficient |
kg-2.m- 2.s6.A2 |
m2.V-2 |
([ΔVolume]/[Volume])/[Electric
field strength]2 |
|
162.
|
Emittance,
luminous |
cd.sr.m-2 |
lm.m-2, lx (lux)
|
[Luminous flux]/[Area].
Same as luminous exitance |
|
163.
|
Energy |
kg.m2.s-2 |
N.m, J
(joule) |
[Force]*[Distance],
[Power]*[Time] |
|
164.
|
Energy,
molar |
kg.m2.s-2.mol-1 |
J.mol-1 |
[Energy]/[Quantity] |
|
165.
|
Energy,
specific |
m2.s-2 |
J.kg-1 |
[Energy]/[Mass] |
|
166.
|
Energy
density |
kg.m-1.s-2 |
J.m-3 |
[Energy]/[Volume] |
|
167.
|
Energy
flux | Power |
kg.m2.s-3 |
J.s-1, W
(watt) |
[ΔEnergy]/[ΔTime] |
|
168.
|
Enthalpy |
kg.m2.s-2 |
J |
Like energy and heat |
|
169.
|
Enthalpy,
molar |
kg.m2.s-2.mol-1 |
J.mol-1 |
[Enthalpy]/[Quantity].
Like molar heat |
|
170.
|
Enthalpy,
specific |
m2.s-2 |
J.kg-1 |
[Enthalpy]/[Mass]. Like specific heat |
|
171.
|
Entropy |
kg.m2.s-2.K-1 |
J.K-1 |
[ΔHeat]/[Temperature]
|
|
172.
|
Entropy, molar |
kg.m2.s-2.K- 1.mol-1 |
J.K-1.mol-1 |
[Entropy]/[Quantity]
|
|
173.
|
Entropy, specific |
m2.s-2.K-1 |
J.K-1.kg-1 |
[Entropy]/[Mass] |
|
174.
|
Evolution rate, log-scale |
s-1 |
|
d{ln(Q)}/dt = (dQ/dt)/Q.
Same as relative evolution rate
|
|
175.
|
Expansion coefficient, thermal |
K-1 |
|
([ΔLength]/[Length])/[Temperature]
|
|
176.
|
Expansion rate, cosmological |
s-1 |
km/s/Mpc |
[Velocity]/[Distance].
Mpc stands for Megaparsec |
|
177.
|
Expectation frequency |
s-1 |
|
[Counts]/[Time]. Like count rate |
|
178.
|
Exposure |
kg-1.s.A |
C.kg-1 |
[Charge]/[Mass]. Used for
ionising radiations |
|
179.
|
Extinction
coefficient |
m-1 |
dB/m |
[Ratio]/m. Used mostly
for radiation |
|
180.
|
Field
tensor, electromagnetic (relativistic Fμν) |
kg.s-2.A-1 |
T |
Like magnetic flux density |
|
181.
|
Fire
point |
K |
|
Temperature at which
ignited vapour keeps burning |
|
182.
|
Flash
point |
K |
|
Temperature at which
vapour can be kept burning |
|
183.
|
Flow |
cur.s-1 |
currency/year |
[ΔValue]/[ΔTime]. Economy
and finance: time derivative |
|
184.
|
Flow
rate, of mass | Mass production rate |
kg.s-1 |
|
[ΔMass]/[Time]. For
example, through a pipe |
|
185.
|
Flow
rate, of volume |
m3.s-1 |
|
[ΔVolume]/[Time]. For
example, through a pipe |
|
186.
|
Force |
kg.m.s-2 |
N
(newton) |
[Mass]*[Acceleration]
|
|
187.
|
Force,
thermodynamic |
kg.m.s-2.mol-1 |
N/mol |
[ΔChemical
potential]/[Distance] |
|
188.
|
Four-current (relativistic Jα) |
m-2.A |
|
Like current density and [Charge]*[c] |
|
189.
|
Four-potential (relativistic Aα) |
kg.m.s-2.A-1 |
m-1.s.V, m.T |
Like magnetic vector potential and [El.potential]/[c] |
|
190.
|
Four-tensor
elmag displacement (relat. Dμν) |
m-1.A |
|
Like magnetic intensity |
|
191.
|
Four-tensor
elmag field (relativistic Fμν) |
kg.s-2.A-1 |
T |
Like magnetic flux density |
|
192.
|
Free
energy |
kg.m2.s-2 |
J |
Also Helmholtz function. Like energy
|
|
193.
|
Free
energy, molar |
kg.m2.s-2.mol-1 |
J.mol-1 |
[Free energy]/[Quantity].
Like Helmholtz function |
|
194.
|
Free
energy, specific |
m2.s-2 |
J.kg-1 |
[Free energy]/[Mass].
Like specific Helmholtz function
|
|
195.
|
Free
enthalpy |
kg.m2.s-2 |
J |
Also Gibbs function. Like energy
|
|
196.
|
Free
enthalpy, molar |
kg.m2.s-2.mol-1 |
J.mol-1 |
[Free
enthalpy]/[Quantity]. Like molar Gibbs
function |
|
197.
|
Free
enthalpy, specific |
m2.s-2 |
J.kg-1 |
[Free enthalpy]/[Mass].
Like specific Gibbs function |
|
198.
|
Frequency
of events |
s-1 |
|
[Counts]/[Time] |
|
199.
|
Frequency
of waves |
s-1 |
Hz |
hertz |
|
200.
|
Frequency
drift rate |
s-2 |
Hz.s-1 |
[ΔFrequency]/[Time] |
|
201.
|
Friction |
kg.m.s-2 |
N |
Tangential force between
two moving surfaces |
|
202.
|
Friction
coefficient |
1 |
Dimensionless |
[Tangential
force]/[Normal force] |
|
203.
|
Fugacity |
kg.m-1.s-2 |
Pa |
Effective pressure in
real gases |
|
204.
|
G: |
|
|
|
|
205.
|
Gain
of a device |
1 |
Dimensionless |
[Output]/[Input],
like-quantities ratio. Often in dB |
|
206.
|
g-factor
of a particle |
1 |
Dimensionless |
[Magnetic
moment]/([Spin].[Bohr magneton]) |
|
207.
|
Gradient,
of electric field |
kg.s-3.A-1 |
V.m-2 |
[ΔEl.field
strength]/[Distance] |
|
208.
|
Gradient,
of magnetic field |
kg.m-1.s-2.A1 |
T.m-1 |
[ΔMag.flux
density]/[Distance] |
|
209.
|
Gradient,
of mass density |
kg.m-4 |
|
[Mass
density]/[Distance]. Same as specific
density gradient |
|
210.
|
Gradient,
of pressure |
kg.m-2.s-2 |
N.m-3, Pa/m |
[Pressure]/[Distance]
|
|
211.
|
Gradient,
thermal |
K.m-1 |
|
[ΔTemperature]/[Distance].
Same as temperature gradient |
|
212.
|
Gravitational
constant G |
kg-1.m3.s-2 |
|
[Force]*[Distance]2/[Mass]2.
Appears in Newton's equation |
|
213.
|
Gravitational
field intensity | Gravity |
m.s-2 |
|
[Force]/[Mass],
[Acceleration] |
|
214.
|
Gravitational
field potential |
m2.s-2 |
|
[Energy]/[Mass]. |
|
215.
|
Gravity | Gravitational
field intensity |
m.s-2 |
|
[Force]/[Mass],
[Acceleration] |
|
216.
|
Growth
rate, relative
|
s-1 |
|
[Relative
variation]/[Time] |
|
217.
|
Growth
rate, linear
|
m.s-1 |
|
[ΔLength]/[Time] |
|
218.
|
Growth
rate, of
area/surface |
m2.s-1 |
|
[ΔArea]/[Time] |
|
219.
|
Growth
rate, of volume
|
m3.s-1 |
|
[ΔVolume]/[Time] |
|
220.
|
Gyromagnetic
ratio |
kg-1.s.A |
Hz.T-1 |
[Mag.moment]/[Angular
moment of motion] |
|
221.
|
Half
life |
s |
|
of a non-conservative /
decaying quantity |
|
222.
|
Hamiltonian |
kg.m2.s-2 |
J |
[Force]*[Distance],
[Power]*[Time]. Like energy |
|
223.
|
Hardness |
kg.m-1.s-2 |
N.m-2 |
[Force]/[Area]. Same as pressure |
|
224.
|
Heat |
kg.m2.s-2 |
J |
Like energy |
|
225.
|
Heat, molar |
kg.m2.s-2.mol-1 |
J.mol-1 |
[Heat]/[Quantity] |
|
226.
|
Heat, specific |
m2.s-2 |
J.kg-1 |
[Heat]/[Mass] |
|
227.
|
Heat capacity |
kg.m2.s-2.K-1 |
J.K-1 |
[ΔHeat]/[ΔTemperature]
|
|
228.
|
Heat capacity, molar |
kg.m2.s-2.K- 1.mol-1 |
J.K-1.mol-1 |
[Heat
capacity]/[Quantity] |
|
229.
|
Heat capacity, specific |
m2.s-2.K-1 |
J.K-1.kg-1 |
[Heat capacity]/[Mass]
|
|
230.
|
Heat conductivity | Thermal conductivity |
kg.m.s-3.K-1 |
W.m-1.K-1 |
[Heat
flux]/([Distance]*[ΔTemperature]) |
|
231.
|
Heat flux |
kg.m2.s-3 |
J.s, W |
[ΔHeat]/[ΔTime]. Like power |
|
232.
|
Heat flux density |
kg.s-3 |
W.m-2 |
[Heat flux]/[Area]. Same
as irradiance |
|
233.
|
Heat of fusion/evaporation, specific |
m2.s-2 |
J.kg-1 |
[Energy]/[Mass] |
|
234.
|
Heat
of fusion | evaporation, molar |
kg.m2.s-2.mol-1 |
J.mol-1 |
[Energy]/[Quantity] |
|
235.
|
Hydraulic conductivity |
m.s-1 |
m/s |
Used for porous media |
|
236.
|
Hydraulic permeability |
m2 |
1 darcy = 10-12
m2 |
[Velocity]*[Viscosity]/[Pressure
gradient], in porous media |
|
237.
|
I: |
|
|
|
|
238.
|
Illuminance |
cd.sr.m-2 |
lm.m-2, lx (lux)
|
[Luminous flux]/[Area]
|
|
239.
|
Impact resistance |
kg.s-2 |
J.m-2 |
[Energy]/[Area] |
|
240.
|
Impedance, acoustic |
kg.m-4.s-1 |
Pa.s/m3,
reyl/m2 |
[ΔPressure]/[Volume flow
rate]. Also acu. resistance / reactance |
|
241.
|
Impedance, acoustic, specific |
kg.m-2.s-1 |
Pa.s/m , reyl |
[ΔPressure]*[Velocity].
Also s.acu. resistance / reactance
|
|
242.
|
Impedance, characteristic, electric |
kg.m2.s-3.A-2 |
V.A-1, Ω, ohm
|
√([Mag.Permeability]/[El.Permittivity])
|
|
243.
|
Impedance, inductive |
kg.m2.s-3.A-2 |
Ω (ohm)
|
i[Angular
frequency].[Inductance] |
|
244.
|
Impedance, of a circuit |
kg.m2.s-3.A-2 |
Ω (ohm)
|
|
|
245.
|
Impulse |
kg.m.s-1 |
|
[ΔMoment of motion], [Force]*[ΔTime], [Mass]*[ΔVelocity] |
|
246.
|
Income rate | Earnings |
cur.s-1 |
currency/year |
[Value]/[Time period].
Economy and finance |
|
247.
|
Inductance |
kg.m2.s-2.A-2 |
V.s.A-1, Wb.A-1, H
(henry) |
[ΔPotential]/[dCurrent/dt],
[Mag.flux]/[Current] |
|
248.
|
Induction,
electric |
m-2.s.A |
C.m-2 |
[Charge]/[Area]. Same as electric flux density |
|
249.
|
Inductive
admittance |
kg-1.m- 2.s3.A2 |
S
(siemens) |
1/[Inductive impedance] |
|
250.
|
Inductive
impedance |
kg.m2.s-3.A-2 |
Ω (ohm)
|
i[Angular frequency].[Inductance] |
|
251.
|
Information |
bit-1 |
bit |
One bit is the elementary information quantum
|
|
252.
|
Information
flux | Baud rate |
bit.s-1 |
baud |
[Information]/[Time] |
|
253.
|
Intensity
of electric current |
m-2.A |
|
[Current]/[Area]. Same as current density |
|
254.
|
Interest |
1 |
% |
[ΔWealth]/[Wealth]. Economy and finance |
|
255.
|
Interest
rate |
s-1 |
%/year |
[Interest]/[Time period]. Economy and finance
|
|
256.
|
Internal
energy |
kg.m2.s-2 |
J |
Like energy
and heat |
|
257.
|
Internal
energy, molar |
kg.m2.s-2.mol-1 |
J.mol-1 |
[Internal energy]/[Quantity]. Like molar heat |
|
258.
|
Internal
energy, specific |
m2.s-2 |
J.kg-1 |
[Internal energy]/[Mass]. Like specific heat |
|
259.
|
Ion
mobility |
kg-1.m-1.s2.A |
m2.s-1.V-1 |
[Velocity]/[Electric field strength] . |
|
260.
|
Ionic
force (strength) |
m-3.mol |
|
Sum([Concentration]*[Ionic quantum charge]2). |
|
261.
|
Ionic
quantum charge |
1 |
Dimensionless |
[Ion charge]/[Elementary charge quantum] |
|
262.
|
Ionic
strength (force) |
m-3.mol |
|
Sum([Concentration]*[Ionic quantum charge]2). |
|
263.
|
Ionization
energy, molar |
kg.m2.s-2.mol-1 |
J.mol-1 |
Energy to ionize a molecule/atom |
|
264.
|
Irradiance |
kg.s-3 |
W.m-2 |
[Heat flux]/[Area]. Same as heat flux density |
|
265.
|
Joule
Thomson so effecient |
Kg-1.m. s-2K |
K.Pa-1 |
ΔTemperature]/[ΔPressure |
|
266.
|
K: |
|
|
|
|
267.
|
Katalytic
activity |
mol.s-1 |
katal |
[ΔQuantity]/[Time]. Same as molar production rate |
|
268.
|
Kinematic
viscosity |
m2.s-1 |
|
[Dynamic viscosity]/[Density] |
|
269.
|
K-space
vector | Reciprocal space position |
m-1 |
|
|
|
270.
|
Lagrangian |
kg.m2.s-2 |
J |
[Force]*[Distance], [Power]*[Time]. Like energy |
|
271.
|
Laplace
operator | Laplacian |
m-2 |
|
|
|
272.
|
Length |
m |
m
(meter) |
|
|
273.
|
Liability
| Debt |
cur |
currency |
Economy and finance |
|
274.
|
Linear
stiffness |
kg.s-2 |
N.m-1 |
[Force]/[Displacement]. ... of a structure
|
|
275.
|
Logarithmic
ratio logb(A/A') in any base b |
1 |
|
Applicable to any ratio of commensurable quantities
|
|
276.
|
Logarithmic
ratio ln(A/A') |
1 |
Np
(neper) |
Uses natural logarithm |
|
277.
|
Logarithmic
ratio Log(P/P')/10 |
1 |
dB
(decibel) |
Uses base-10 logarithm. Aplies only
to power P |
|
278.
|
Logarithmic
ratio Log(X/X')/20 |
1 |
dB
(decibel) |
Aplies to voltages (X=V) and currents (X=I)
|
|
279.
|
Logarithmic scale differential |
1 |
Dimensionless |
dQ/Q, d{ln(Q)}, for any
quantity Q. Also relative differential
|
|
280.
|
Logarithmic
scale probability density |
1 |
1/Np |
[Probability]/[Natural-logarithmic
ratio] |
|
281.
|
Loss of a device |
1 |
Dimensionless |
[Output]/[Input],
like-quantities ratio. Often in dB |
|
282.
|
Luminance |
cd.m-2 |
|
[Luminosity]/[Area] |
|
283.
|
Mass
number of an isotope |
1 |
Dimensionless |
Number of
protons+neutrons in the isotope nuclide |
|
284.
|
1 |
Dimensionless |
Of a body on a Kepler
orbit; t.sqrt(G(M1+M2)/r3) |
|
|
285.
|
s-1 |
|
Of a body on a Kepler
orbit; sqrt(G(M1+M2)/r3) |
|
|
286.
|
Modulus
of compression |
kg-1.m.s2 |
Pa-1 |
[Pressure]/([ΔVolume]/[Volume]).
Same as compressibility |
|
287.
|
Modulus
of rigidity |
kg.m-1.s-2 |
N.m-2, Pa |
[Stress]/[Strain]. Same
as shear modulus |
|
288.
|
Mobility,
ionic |
kg-1.m-1.s2.A |
m2.s-1.V-1 |
[Velocity]/[Electric
field strength] . |
|
289.
|
Molality
(intended as concentration) |
kg-1.mol |
mol/kg |
[Quantity]/[Mass] |
|
290.
|
Molar
charge |
s.A.mol-1 |
C.mol-1 |
[Charge]/[Quantity] |
|
291.
|
Molar
concentration |
m-3.mol |
|
[Quantity]/[Volume]. Same
as concentration or molarity |
|
292.
|
Molar
concentration gradient |
m-4.mol |
|
[Molarity]/[Distance]. Same as molarity gradient |
|
293.
|
Molar
concentration ratio |
1 |
Dimensionless |
[Partial quantity]/[Total
quantity] |
|
294.
|
Molar
conductivity, electric |
kg-1.m- 3.s3.A2.mol-1 |
S.m-1.mol-1 |
[El.conductivity]/[Concentration]
|
|
295.
|
Molar
density |
m-3.mol |
|
[Quantity]/[Volume]. Same
as concentration |
|
296.
|
Molar
energy |
kg.m2.s-2.mol-1 |
J.mol-1 |
[Energy]/[Quantity] |
|
297.
|
Molar
enthalpy |
kg.m2.s-2.mol-1 |
J.mol-1 |
[Enthalpy]/[Quantity].
Like molar heat |
|
298.
|
Molar
entropy |
kg.m2.s-2.K- 1.mol-1 |
J.K-1.mol-1 |
[Entropy]/[Quantity]
|
|
299.
|
Molar
free energy |
kg.m2.s-2.mol-1 |
J.mol-1 |
[Free energy]/[Quantity].
Also molar Helmholtz function
|
|
300.
|
Molar free enthalpy |
kg.m2.s-2.mol-1 |
J.mol-1 |
[Free
enthalpy]/[Quantity]. Also molar Gibbs
function |
|
301.
|
Molar heat |
kg.m2.s-2.mol-1 |
J.mol-1 |
[Heat]/[Quantity] |
|
302.
|
Molar heat capacity |
kg.m2.s-2.K- 1.mol-1 |
J.K-1.mol-1 |
[Heat
capacity]/[Quantity] |
|
303.
|
Molar internal energy |
kg.m2.s-2.mol-1 |
J.mol-1 |
[Internal
energy]/[Quantity]. Like molar heat
|
|
304.
|
Molar mass |
kg.mol-1 |
|
[Mass]/[Quantity] |
|
305.
|
Molar particle count |
mol-1 |
|
[Count]/[Mol]. For
example, the Avogadro constant |
|
306.
|
Molar production rate |
mol.s-1 |
|
[ΔQuantity]/[Time]. |
|
307.
|
Molar refractivity |
m3.mol-1 |
|
[(r2-1)/(r2+2)]/[Concentration],
where r is the refractive index |
|
308.
|
Molar relaxivity |
s-1.mol-1 |
|
[Relaxation
rate]/[Concentration] |
|
309.
|
Molar solubility |
m-3.mol |
|
[Quantity]/[Volume]. Same
as concentration |
|
310.
|
Molar volume |
m3.mol-1 |
|
[Volume]/[Quantity] |
|
311.
|
Molarity |
m-3.mol |
|
[Quantity]/[Volume]. Same
as concentration or molar density |
|
312.
|
Molarity
gradient |
m-4.mol |
|
[Molarity]/[Distance].
Same as concentration gradient
|
|
313.
|
Molecular quantum charge |
1 |
Dimensionless |
[Charge of a
molecule]/[Elementary charge quantum] |
|
314.
|
Moment of force |
kg.m2.s-2 |
N.m |
[Force]*[Distance] |
|
315.
|
Moment of motion |
kg.m.s-1 |
|
[Mass]*[Velocity], [Mass
flow]*[Distance] |
|
316.
|
Multiple derivatives with respect to time |
s-p |
|
dp/dtp, ∂p/∂tp; for p = 1,2,3,.. |
|
317.
|
Multiple derivatives with respect to a length
|
m-p |
|
dp/drp, ∂p/∂rp; for p = 1,2,3,..., r =
x | y | z |
|
318.
|
Probability
density on log-scale |
1 |
Np-1 |
[Probability]/[Natural-logarithmic ratio]
|
|
319.
|
Purchase
| Transaction value |
cur |
currency |
Economy and finance |
|
320.
|
Relativistic electromagnetic field tensor (Fμν) |
kg.s-2.A-1 |
T |
Like magnetic flux density |
|
321.
|
Relativistic four-current (Jα) |
m-2.A |
|
Like current density and [Charge]*[c] |
|
322.
|
Shear modulus |
kg.m-1.s-2 |
N.m-2, Pa |
[Stress]/[Strain]. Like Young modulus |
|
323.
|
Softening point |
K |
|
Temperature at which
hardness drops below a level |
|
324.
|
Solid angle |
1 |
sr
(steradian) |
|
|
325.
|
Solubility, molar |
m-3.mol |
|
[Quantity]/[Volume]. Same
as concentration |
|
326.
|
Sonic attenuation |
m-1 |
dB/m |
[Power ratio]/m. Used in
acoustics |
|
327.
|
Specific acoustic impedance |
kg.m-2.s-1 |
Pa.s/m , reyl |
[ΔPressure]*[Velocity].
Also s.acu. resistance / reactance
|
|
328.
|
Specific acoustic conductance |
kg-1.m2.s |
reyl-1 |
Also specific acoustic susceptance |
|
329.
|
Specific charge |
kg-1.s.A |
C.kg-1 |
[Charge]/[Mass]. Charge/mass ratio |
|
330.
|
Specific density |
kg.m-3 |
|
[Mass]/[Volume]. Same as density of mass |
|
331.
|
Specific density gradient |
kg.m-4 |
|
[Mass
density]/[Distance]. Same as mass
density gradient |
|
332.
|
Specific energy |
m2.s-2 |
J.kg-1 |
[Energy]/[Mass] |
|
333.
|
Specific enthalpy |
m2.s-2 |
J.kg-1 |
[Enthalpy]/[Mass]. Like specific heat |
|
334.
|
Specific entropy |
m2.s-2.K-1 |
J.K-1.kg-1 |
[Entropy]/[Mass] |
|
335.
|
Specific free energy |
m2.s-2 |
J.kg-1 |
[Free energy]/[Mass].
Also specific Helmholtz function
|
|
336.
|
Specific free enthalpy |
m2.s-2 m2.s-2 |
J.kg-1 J.kg-1 |
[Free enthalpy]/[Mass].
Also specific Gibbs function |
|
337.
|
Strength,
electric field | Electric intensity |
kg.m.s-3.A-1 |
V.m-1 |
[ΔPotential]/[Distance]
|
|
338.
|
Strength,
ionic |
m-3.mol |
|
Sum([Concentration]*[Ionic
quantum charge]2). |
|
339.
|
Strength,
magnetic field | Magnetic intensity |
m-1.A |
|
[Current]/[Distance]
|
|
340.
|
Strength,
tensile |
kg.m-1.s-2 |
N.m-2, Pa |
[Force]/[Area]. Same as pressure |
|
341.
|
Superficial
porosity |
1 |
Dimensionless |
[Void
cross section]/[Total cross section], in porous
media |
|
342.
|
Superficial
velocity |
m.s-1 |
m/s |
In porous media; as if the space was filled only by the fluid |
|
343.
|
Surface
area |
m2 |
|
[Distance]*[Distance].
Applicable to 3D bodies |
|
344.
|
Surface
density of charge |
m-2.s.A |
C.m-2 |
[Charge]/[Area] |
|
345.
|
Surface
element |
m2 |
|
[Distance]*[Distance].
Same as area |
|
346.
|
Surface
energy |
kg.s-2 |
J/m2 |
[Energy]/[Area]. Same as surface tension |
|
347.
|
Surface
growth rate |
m2.s-1 |
|
[ΔArea]/[Time] |
|
348.
|
Surface
tension |
kg.s-2 |
N/m |
[Force]/[Length]. Same as
surface energy |
|
349.
|
Susceptance,
acoustic, specific |
kg-1.m2.s |
reyl-1 |
Also specific acoustic conductance |
|
350.
|
Velocity,
advection |
m.s-1 |
m/s |
In porous
media; actual progress along pressure gradient |
THE
END
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