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Physics > Physics Abbreviations

The tables below show the estimated generated power (in Watts) for various devices or processes and during human activities.

The following table lists common physics abbreviations and symbols.

Symbol Meaning
A area
a acceleration
B magnetic field
C capacitance, heat capacity
c speed of light (in a vacuum), speed of sound, specific heat capacity
D electric displacement
d distance, diameter, differential (e.g. dx)
E energy, electric field
F force
f friction, frequency, function
G gravitational constant
g acceleration due to gravity
H magnetic field
h height, Planck constant
hbar reduced Planck constant
I electric current, sound intensity, moment of inertia
i imaginary unit
J current density
k Boltzmann constant, thermal conductivity
L angular momentum, inductance
l length
M moment of force
m mass
n refractive index
P power, pressure
p momentum
Q electric charge, heat
R electrical resistance
r radius, radius vector (position)
S surface area, entropy, action
s displacement
T temperature, period
t time
U internal energy, potential energy
V volume, voltage, shear force
v velocity
W mechanical work
w width
x a generic unknown, displacement
γ (Gamma) Lorentz factor, photon, gamma ray
Δ (Delta) a change in a variable (e.g. Δx)
δ (Delta) displacement (usually small)
ε (Epsilon) strain
ζ (Zeta) damping ratio
η (Eta) energy efficiency
θ (Theta) angle
λ (Lambda) wavelength
μ (Mu) coefficient of friction, dynamic viscosity, permeability (electromagnetism)
ν (Nu) kinematic viscosity
π (Pi) 3.14159...
ρ (Rho) resistivity, density, charge density
Σ (Sigma) summation operator
σ (Sigma) electrical conductivity, normal stress
τ (Tau) torque, shear stress, time constant
Φ (Phi) magnetic flux
φ (Phi) electric potential
Ω (Omega) ohm
ω (Omega) angular frequency