AccelerationDueToGravity is the acceleration of a body freely falling in a vacuum on Earth at sea level.
AgeOfUniverse is the age of the universe, a physical constant.
BoltzmannConstant is the ratio of the universal gas constant (MolarGasConstant) to Avogadro's number (AvogadroConstant).
CosmicBackgroundTemperature is the temperature of the cosmic background radiation.
DeuteronMass is the mass of a deuteron.
EarthRadius is the radius of Earth, a physical constant.
FaradayConstant is the product of the Avogadro constant (AvogadroConstant) and the elementary charge (ElectronCharge).
MolarVolume is the volume occupied by a mole or a gram molecular weight of any gas measured at standard conditions.
MuonMass
(Physical Constants Package Symbol) MuonMass is the mass of a muon.
NeutronMass is the mass of a neutron.