scalar quantity
quantity represented by a scalar: quantity having no direction
energy
quantitative property of a physical system, recognizable in the performance of work and in the form of heat and light
frequency
number of occurrences or cycles per time
temperature
physical property of matter that quantitatively expresses the common notions of hot and cold
voltage
line integral of the electric field strength
amount of substance
extensive physical property
shear stress
component of stress coplanar with a material cross section
Dwell time
time that an antenna beam spends on a target
magnetomotive force
a quantity representing the sum of magnetizing forces along a circuit
flow speed
length of the flow velocity vector, scalar
magnetic constant
physical constant; ratio between the magnetic H-field and the magnetic B-field in classical vacuum
mean lifetime
in nuclear physics, the reciprocal of the decay constant
Cartesian coordinate
coordinate in a Cartesian coordinate system
mutual inductance
physical quantity
angular speed
rate of change of angle
electrical conductance
reciprocal of electrical resistance
crest factor
peak divided by the Root mean square (RMS) of the waveform
magnetic reluctance
in physics, the ratio of magnetomotive force to magnetic flux; the magnetic analogue of electrical resistance
Charge carrier density
charge carriers per volume; such as electrons, ions, "holes" or others
reaction rate
for a reactant or product in a particular reaction is intuitively defined as how quickly or slowly a reaction takes place
speed
magnitude of velocity of motion
power
rate at which energy is transferred, used, or transformed
electric current
base quantity of the International System of Quantities (ISQ), measured in ampere (A)
time to live
mechanism that limits the lifespan of data in a computer or network
luminous energy
scalar physical quantity
propagation coefficient
complex measure of the attenuation (real part) and phase angle (imaginary part) along the path travelled by a plane wave
thermodynamic potential
scalar physical quantities representing system states
electrical conduction
physical property
homologous temperature
temperature of a material as a fraction of its absolute melting point
linear density of electric charge
physical quantity
electric potential difference
line integral over the sum of electric field strength and the time derivative of the magnetic vector potential
kinetic energy
energy of a moving physical body
mass number
number of heavy particles in the atomic nucleus
impedance of vacuum
physical constant relating the magnitudes of the electric and magnetic fields of electromagnetic radiation travelling through free space
instantaneous electric power
product of instantaneous voltage and electric current
magnetic tension
line integral of the magnetic field strength between two points
apparent impedance
quotient of the RMS values of voltage and electric current
pressure
force applied over an area
half-life
mean duration after which a decaying quantity has reached half of its initial value
specific impulse
how efficiently a reaction mass engine creates thrust, which is often proportional to effective exhaust gas velocity
electrical resistivity
physical quantity and property of material; inverse of the electric conductivity
moment of inertia
scalar measure of the rotational inertia with respect to a fixed axis of rotation
inductance
property of electrical conductors to oppose changes in current flow
electromotive force
scalar physical quantity homogeneous to a voltage, expressing the modulus of the force exerted on a charge in an electric field
displacement current
electromagnetism
potential difference
difference between physical potentials at two points
energy flux density
energy transferred through a surface per time and area
headway
distance or duration between vehicles in transport operation