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Quantities, Units and Symbols
| QUANTITY
| SYMBOL
| SI UNIT
| SYMBOL
| DERIVATION
| | acceleration
| a
| m s -2
| –
| velocity/time
| | acceleration due to gravity
| g
| m s-2
| –
| velocity/time
| | amount of substance
| n
| mole
| mol
| mole fraction (n) used
| | amplification factor
| μ
| a ratio
| –
| –
| | angle
| θ p φpα1
| –
| –
| –
| | – of incidence
| i
| degree or radian
| °
| –
| | – of refraction
| r
| degree or radian
| °
| –
| | – Bragg
| θ
| number
| –
| –
| | – critical
| с
| degree or radian
| °
| –
| | anode slope resistance
| RA
| ohm
| Ω
| ДV a /ДV a
| | area
| A
| metres square
| m2
| l x b
| | atomic number
| Z
| a number
| –
| number of protons
| | Avogadro constant
| L, NA
| number
| –
| –
| | breadth
| b
| metre
| m
| fundamental unit
| | capacitance
| С
| farad
| F
| charge/p.d.
| | charge, electric
| Q
| coulomb
| С
| current x time
| | on electron
| e
| coulomb
| С
| l.6 x 10-19C
| | conductance
| G
| ohm-1
| Ω-1
| reciprocal of resistance
| | current, electric
| I
| ampere
| A
| fundamental unit
| | decay constant
| λ
| a ratio
| –
| –
| | density
| ρ
| kg m-3
| –
| m/V
| | distance along path
| s
| metre
| m
| fundamental unit
| | efficiency
| η
| a ratio
| –
| work output/ work input
| | electrochemical equivalent
| z
| gC-1
| –
| mass/charge
| | electromotive force
| E
| volt
| V
| energy/charge
| | electron
| e
|
|
|
| | energy
| E
| joule
| J
| N m
| | – kinetic
| Ek
| joule
| J
| N m.Ek=Smv2
| | – potential
| Ep
| joule
| J
| N m.Ep=mgh
| | Faraday constant
| F
| coulomb mol-1
| C mol-1
| 96 500 С mol-1
| | field strength,
| E
| Vm-1
| –
| potential gradient:
| | electric
|
|
|
| p.d./dist.
| | magnetic
| H
| ampereturns
| –
| current  no. of turns
| | flux, magnetic
| Ф
| weber
| Wb
| e.m.f./rate of change of flux
| | flux density
| В
| tesla
| Т
| flux/area
| | focal length
| f
| metre
| M
| –
| | force
| F
| newton
| N
| kg m s-2
| | free energy
| ΔG
| joule
| J
|
| | frequency
| f
| hertz
| Hz
| oscillations/ time
| | gas constant
| r
| joule
| J
| energy
| | half-life, radioactivity
| t1/2
| second
| s
| fundamental unit
| | heat capacity
| С
| JK-1
| –
| quantity of heat/ temp. rise
| | heat of reaction
| ΔH
| joule
| J
| heat energy
| | heat capacity, specific
| с
| J K-1kg-1
| –
| heat capacity/ mass
| | heat, quantity of
| q
| joule
| J
| energy
| | height
| h
| metre
| m
| fundamental unit
| | image distance
| v
| metre
| m
| fundamental unit
| | inductance, mutual
| M
| henry
| H
| induced e.m.f./rate of change of current
| | self
| L
| henry
| H
| –
| | intensity of radiation
| I
| a number
| –
| –
| | latent heat
| L
| joule
| J
| quantity of heat
| | –, specific
| l
| J kg-1
| –
| quantity of heat
| | –, molar
| Lm
| joule mol-1
| J
| quantity of heat
| | length
| l
| metre
| m
| fundamental unit
| | magnetizing force
| H
| ampereturns
| –
| –
| | magnetic moment
| m
| Wb m
| –
| torque in unit magnetic field
| | magnification, linear
| m
| a ratio
| –
| –
| | mass
| m
| kilogramme
| kg
| fundamental unit
| | – number
| A
| a number
| –
| number of neutrons + protons
| | molar volume
| Vm
| (dm3)
| –
| volume of 1 mole
| | molar solution
| M
| a ratio
|
| moles/dm3
| | moment of force
| –
| N m
| –
| force perp. distance
| | neutron number
| N
| a number
| –
| number of neutrons
| | number
| n
| –
| –
| –
| | – of molecules
| N
| –
| –
| –
| | – of turns on coil
| n
| a number
| –
| –
| | – order of spectrum
| p
| a number
| –
| –
| | object distance
| u
| metre
| m
| fundamental unit
| | peak current
| I0
| ampere
| A
| see current
| | peak e.m.f.
| E0
| volt
| V
| see e.m.f.
| | period
| Т
| second
| s
| fundamental unit
| | permeability
| μ
| H m-1
| –
| henry/metre
| | – of vacuum
| μ0
| H m-1
| –
| –
| | –, relative
| μr
| a ratio
| –
| м = м / м0
| | permittivity
| ε
| F m-1
| –
| farad/metre
| | – of vacuum
| ε 0
| F m-1
| –
| farad/metre
| | –, relative
| ε r
| a ratio
| –
| е r = е / е 0
| | potential, electric
| V
| volt
| V
| energy/charge
| | potential difference
| V
| volt
| V
| energy/charge
| | power
| P
| watt
| W
| J s-1
| | pressure
| p
| pascal
| Pa
| Nm-2: force/area
| | radius
| r
| metre
| m
| fundamental unit
| | reactance
| X
| ohm
| Ω
| E0 /l0
| | refractive index
| n
| a ratio
| –
| –
| | resistance
| R
| ohm
| Ω
| p.d./current
| | resistivity, electrical
| ρ
| ohm-metre
|
| resistance x length
| | relative density
| d
| a ratio
| –
| сsub / сwater
| | r.m.s. current
| Irms
| ampere
| A
| see current
| | r.m.s. voltage
| Vrms
| volt
| V
| see e.m.f.
| | slit separation
| S
| metre
| m
| fundamental unit
| | tension
| Т
| newton
| N
| see force
| | temperature, Celsius
| θ
| degree С
| °C
| from kelvin
| | temp., interval
| θ
| degree
| ° or K
| –
| | temp., absolute
| T
| kelvin
| К
| fundamental unit
| | thickness
| d
| metre
| m
| fundamental unit
| | time
| t
| second
| s
| fundamental unit
| | torque
| T
| N m
| –
| see moment
| | turns ratio
| Т
| a ratio
| –
| nsec / nprim
| | (unit of electricity)
| –
| kWh
| –
| kilowatt hour
| | velocity
| u, v
| m s-1
| –
| distance/time
| | –, angular
| ω
| second -1
| s-1
| angle/time
| | – of e.m. waves
| c
| m s-1
| –
| –
| | – of sound
|
| m s-1
| –
| –
| | volume
| V
| metre cubed
| m3
| l b h
| | wavelength
| λ
| metre
| m
| fundamental unit
| | work
| w
| joule
| J
| force x distance
(N • m)
| | weight
| W
| newton
| N
| kg m s-2 or mg
|
Appendix 10
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Археология
Биология
Генетика
География
Информатика
История
Логика
Маркетинг
Математика
Менеджмент
Механика
Педагогика
Религия
Социология
Технологии
Физика
Философия
Финансы
Химия
Экология
