Expand description
Physical constants as dimensioned Quantitys (CODATA / SI-2019 defined values
where exact). Each carries its dimension so it composes correctly in unit-checked
arithmetic — e.g. ½·m·v² divided by k_B·T is dimensionless by construction.
Constants§
- AVOGADRO
- Avogadro constant,
N_A(exact, SI-2019). mol⁻¹. - BOLTZMANN
- Boltzmann constant,
k_B(exact, SI-2019). J/K = m²·kg·s⁻²·K⁻¹. - ELECTRON_
MASS - Electron mass,
m_e. kg. - ELEMENTARY_
CHARGE - Elementary charge,
e(exact, SI-2019). Coulomb = A·s. - GAS_
CONSTANT - Molar gas constant,
R = N_A·k_B(exact). J·mol⁻¹·K⁻¹. - GRAVITATIONAL
- Newtonian constant of gravitation,
G. m³·kg⁻¹·s⁻². - PLANCK
- Planck constant,
h(exact, SI-2019). J·s = m²·kg·s⁻¹. - PROTON_
MASS - Proton mass,
m_p. kg. - REDUCED_
PLANCK - Reduced Planck constant,
ħ = h/2π. Same dimension ash. - SPEED_
OF_ LIGHT - Speed of light in vacuum,
c(exact, SI-2019). 299 792 458 m/s. - STANDARD_
ATMOSPHERE - Standard atmosphere (defined). 101 325 Pa.
- STANDARD_
GRAVITY - Standard gravity,
g₀(defined). m/s². - STEFAN_
BOLTZMANN - Stefan–Boltzmann constant,
σ. W·m⁻²·K⁻⁴ = kg·s⁻³·K⁻⁴.