Physical Constants

Physical constants - SI Units.

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Description	Symbol	Formula	Value₁	Unit₁	Value₂	Unit₂
Absolute zero, temperature			0	^oK	-273.15	^oC
Acceleration of gravity at earth's surface	g		9.81	m/s²	32.2	ft/s²
Atmospheric pressure at sea level			1.013 25 *10⁵	N/m²	14.69	lb/in²
Atomic mass unit			1.660 540 *10^-27	kg	1.000	u
Avogadro's constant	N_A		6.022 141*10²³	mol^-1
Base of natural logaritms	e		2.718 281 828...
Base of natural logaritms	lnx		2.3026 log x
Bohr magneton	μ_B	e h/4πm_e	9.274 009 994 *10^-24	Am²	5.788 381 *10⁻⁵	eV/T
Bohr radius	a₀	ε₀h²/π m_ee²	5.291 772 106 7* 10^-11	m	2.08 *10^-9	in
Boltzmann constant	k	R/N_A	1.380 648 52 *10^-23	J/K	8.617 330 *10⁻⁵	eV/K
Charge of electron	e		1.602 176 *10^-19	C
Faraday constant	F	e N_A	9.6 485332 89 * 10⁴	C/mol	26.801	Ah/mol
Fine structure constant	α		7.297 20* 10^-3
Gas constant (molar, ideal)	R		8.314 459 8	J/molK	82.057 338	cm³atm/molK
Gravitational constant	G		6.674 08 *10^-11	m³/kg s²
Mass of electron (rest mass)	m_e		9.109 383 56 *10^-31	kg	5.485 799*10⁻⁴	u
Mass of neutron	m_n		1.674 927 47* 10^-27	kg	1.008 664 915	u
Mass of proton	m_p		1.672 621 90 *10^-27	kg	1.007 276 466	u
Permeability of a vacuum	μ₀		4p *10^-7	kg m/s²A²
Permittivity of a vacuum	ε₀	1/μ₀c₀²	8.854 187 817 *10^-12	C²/Nm²		A²s⁴/kg m³
Planck's constant	h		6.626 070 040 * 10^-34	J s	4.135 667 *10^-15	eV s
Radiation constant, first	C₁	2 π h c²	3.741 844 *10^-16	Wm²
Radiation constant, second	C₂	h c/k	1.438 833 *10^-2	mK
Ratio of a circle's circumference(C) to its diameter	π	C/d	3.141 592 653…
Rydberg constant	R∞	m_ee⁴/8ε₀²h³c₀	1.097 373 156 * 10⁷	m^-1
Speed of light in vacuum	c₀		2.99 792 458 *10⁸	m/s
Stefan-Boltzmann constant	σ		5.670 367*10^-8	W/m²K⁴	11.7 *10⁻⁸	cal/cm²dayK⁴
Volume ideal gas, 1 atm, 0°C	V_m		22413.6	cm³/mol	22.4136	liter/mol
Volume ideal gas,1 atm, 25°C	V_m		24466.1	cm³/mol	1.0244651	m³/mol

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Physical Constants