Physics > Physics Abbreviations

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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