units::constants Namespace Reference

namespace for physical constants like PI and Avogadro's Number. More...

Functions
Unit Containers
constexpr unit< detail::PI >	pi (1)
	Ratio of a circle's circumference to its diameter.
constexpr meters_per_second	c (299792458.0)
	Speed of light in vacuum.
constexpr unit< compound_conversion_factor< cubed< meters_ >, inverse< kilograms_ >, inverse< squared< seconds_ > > > >	G (6.67430e-11)
	Newtonian constant of gravitation.
constexpr unit< compound_conversion_factor< joules_, seconds_ > >	h (6.62607015e-34)
	Planck constant.
constexpr unit< compound_conversion_factor< joules_, seconds_ > >	h_bar (1.054571817e-34)
	Reduced Planck constant.
constexpr unit< compound_conversion_factor< newtons_, inverse< squared< amperes_ > > > >	mu0 (1.25663706212e-6)
	vacuum permeability.
constexpr unit< compound_conversion_factor< farads_, inverse< meters_ > > >	epsilon0 (8.8541878128e-12)
	vacuum permittivity.
constexpr ohms	Z0 (376.730313668)
	characteristic impedance of vacuum.
constexpr unit< compound_conversion_factor< newtons_, square_meters_, inverse< squared< coulombs_ > > > >	k_e (8.9875517923e9)
	Coulomb's constant.
constexpr coulombs	e (1.602176634e-19)
	elementary charge.
constexpr kilograms	m_e (9.1093837015e-31)
	electron mass.
constexpr kilograms	m_p (1.67262192369e-27)
	proton mass.
constexpr unit< compound_conversion_factor< joules_, inverse< teslas_ > > >	mu_B (9.2740100783e-24)
	Bohr Magneton.
constexpr unit< inverse< mols_ > >	N_A (6.02214076e23)
	Avogadro's Number.
constexpr unit< compound_conversion_factor< joules_, inverse< kelvin_ >, inverse< mols_ > > >	R (8.314462618)
	Gas constant.
constexpr unit< compound_conversion_factor< joules_, inverse< kelvin_ > > >	k_B (1.380649e-23)
	Boltzmann constant.
constexpr unit< compound_conversion_factor< coulombs_, inverse< mols_ > > >	F (96485.33212)
	Faraday constant.
constexpr unit< compound_conversion_factor< watts_, inverse< square_meters_ >, inverse< squared< squared< kelvin_ > > > > >	sigma (5.670374419e-8)
	Stefan-Boltzmann constant.

Detailed Description

namespace for physical constants like PI and Avogadro's Number.

Source: https://physics.nist.gov/cuu/Constants/index.html (2019)

See also

See unit for more information on unit type containers.