SolarRadius (Physical Constants Package Symbol)

SolarRadius is a physical constant.

SpeedOfSound (Physical Constants Package Symbol)

SpeedOfSound is the speed of sound at sea level in the standard atmosphere.

VacuumPermeability (Physical Constants Package Symbol)

VacuumPermeability is the permeability of vacuum, a universal constant.

VacuumPermittivity (Physical Constants Package Symbol)

VacuumPermittivity is the permittivity of vacuum, a universal constant.

NumberOfEdges (Polytopes Package Symbol)

NumberOfEdges[polytope] gives the number of edges of polytope.

NumberOfFaces (Polytopes Package Symbol)

NumberOfFaces[polytope] gives the number of faces of polytope.

NumberOfVertices (Polytopes Package Symbol)

NumberOfVertices[polytope] gives the number of vertices of polytope.

Deuterium (Resonance Absorption Lines Package Symbol)

Deuterium is an isotope of hydrogen.

CollisionFrequency (Standard Atmosphere Package Symbol)

CollisionFrequency[altitude] gives the collision frequency at the specified altitude altitude.

KineticTemperature (Standard Atmosphere Package Symbol)

KineticTemperature[altitude] gives the kinetic temperature at the specified altitude altitude.