Quantity Symbol Unit Quantity Symbol Unit
length l, h ... km, m, cm, mm
area A m2, cm2
volume V m3, cm3
weight W N N*
mass m, M kg, g mg
time t h, min, s ms
density* g/cm3, kg/m3
speed* u, v km/h, m/s, cm/s
acceleration a acceleration* m/s2
acceleration of
free fall g
force F, P ... N force* N*
moment of a force* N m
work done W, E J work done by a force* J*
energy E J J*, kW h*
power P W power* W*
pressure p, P pressure* Pa*, N/m2
atmospheric pressure millibar
temperature θ, t °C
specific heat
capacity c J/(g °C), J/(kg °C) specific heat capacity*
latent heat L J specific latent heat* l
J/kg, J/g
frequency* f Hz
wavelength* λ m, cm
focal length f
angle of incidence i degree (°) refractive index n
angle of reflection,
refraction r degree (°)
critical angle c degree (°)
potential difference/voltage V V, mV potential difference* V*
current I A, mA current*
charge C, A s
e.m.f. E V e.m.f.*
resistance R Ω
Quantity Symbol Unit Quantity Symbol Unit
length l, h ... km, m, cm, mm
area A m2, cm2
volume V m3, cm3
weight W N N*
mass m, M kg, g mg
time t h, min, s ms
density* g/cm3, kg/m3
speed* u, v km/h, m/s, cm/s
acceleration a acceleration* m/s2
acceleration of
free fall g
force F, P ... N force* N*
moment of a force* N m
work done W, E J work done by a force* J*
energy E J J*, kW h*
power P W power* W*
pressure p, P pressure* Pa*, N/m2
atmospheric pressure millibar
temperature θ, t °C
specific heat
capacity c J/(g °C), J/(kg °C) specific heat capacity*
latent heat L J specific latent heat* l
frequency* f Hz
wavelength* λ m, cm
focal length f
angle of incidence i degree (°) refractive index n
angle of reflection,
refraction r degree (°)
critical angle c degree (°)
potential difference/voltage V V, mV potential difference* V*
current I A, mA current*
charge C, A s
e.m.f. E V e.m.f.*
resistance R Ω