Other noise descriptors, ambient noise • background noise • broadband noise • narrowband noise • periodic • pink noise • pseudo random noise • random noise • residual sound • specific sound • white noise • wideband noise
giga (G) the SI prefix = 109
See other SI Units
Gradian (g) also known as a grad. One grad or gradian equals 9/10 of a degree or π/200 of a radian.
See also anglesgram (g) the unit of mass in the metric system.
The kilogram (Kg) rather than the gram is considered the base unit of mass in the SI units because the gram is so small. The old French spelling gramme is sometimes used but gm is wrong.
Gravitational Force the force of attraction between the earth's mass (for example) and bodies near its surface, the further apart the less gravity. The gravitational force between two bodies is proportional to the product of their masses and inversely proportional to the square of the distance between them.
Gravity (g) the unit for measuring acceleration. For example 1 g = 9.81 m/s² is the acceleration due to gravity at the surface of the Earth.
Group Velocity Definition (IEC 801-23-21) velocity in the direction of propagation of a characteristic feature of the envelope of a non-sinusoidal disturbance.
Note : group velocity differs from phase velocity only in a dispersive medium
Note : group velocity is ordinarily the velocity of propagation of the energy associated with the disturbance.
See also velocity