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Physical Constants

Atomic and Nuclear Constants

Table B.3. Variables: Atomic and Nuclear Constants

Title

Names

Value

Alpha Particle Mass

alpha_particle_mass / m_α

6.6446565E-24*g (approximate)

Bohr Radius

bohr_radius / a_o

0.5291772108E-10*m (approximate)

Classical Electron Radius

classical_electron_radius / r_e

2.817940325E-15*m (approximate)

Compton Wavelength

compton_wavelength / λ_C

2.426310238E-12*m (approximate)

Electron Mass

electron_mass / m_e

9.1093826E-28*g (approximate)

Helion Mass

helion_mass / m_h

5.00641214E-24*g (approximate)

Neutron Mass

neutron_mass / m_n

1.67492728E-24*g (approximate)

Proton Mass

proton_mass / m_p

1.67262171E-24*g (approximate)

Rydberg Constant

rydberg / R_∞

10973731.568525*m^(-1) (approximate)

Tau Mass

tau_mass / m_τ

3.16777E-24*g (approximate)

Electromagnetic Constants

Table B.4. Variables: Electromagnetic Constants

Title

Names

Value

Borh Magneton

bohr_magneton / μ_B

927.400949E-26*J*T^(-1) (approximate)

Conductance Quantum

conductance_quantum / G_0

7.748091733E-5*S (approximate)

Elementary Charge

elementary_charge / e_charge

1.60217653E-19*C (approximate)

Josephson Constant

josephson / K_J

483597.879E9*Hz*V^(-1) (approximate)

Magnetic Flux Quantum

magnetic_flux_quantum / Φ_0

2.06783372E-15*Wb (approximate)

Nuclear Magneton

nuclear_magneton / μ_N

5.05078343E-27*J*T^(-1) (approximate)

von Klitzing Constant

klitzing / R_K

25812.807449*ohm (approximate)

Physico-Chemical Constants

Table B.5. Variables: Physico-Chemical Constants

Title

Names

Value

Atomic Mass Constant

atomic_mass / m_u

1.66053886E-24*g (approximate)

Avogadro Constant

avogadro / N_A

6.0221415E23*mol^(-1) (approximate)

Boltzmann Constant

boltzmann

1.3806505E-23*J*K^(-1) (approximate)

Faraday Constant

faraday

96485.3383*C*mol^(-1) (approximate)

First Radiation Constant

first_radiation / c_1

3.74177138E-16*W*m^2 (approximate)

Ideal Gas Constant

ideal_gas

8.314472*J*K^(-1)*mol^(-1) (approximate)

Second Radiation Constant

second_radiation / c_2

1.4387752E-2*m*K (approximate)

Universal Constants

Table B.6. Variables: Universal Constants

Title

Names

Value

Characteristic Impedance of Vacuum

characteristic_impedance / Z_0

4E-7*pi*299792458*ohm

Electric Constant (Permittivity of Free Space)

electric_constant / ε_0

1/(4E-7*pi*299792458^2)*F*m^(-1)

Magnetic Constant (Permeability of Free Space)

magnetic_constant / μ_0

4E-7*pi*N*A^(-2)

Newtonian Constant of Gravitation

newtonian_constant / G

6.6742E-11*m^3*kg^(-1)*s^(-2) (approximate)

Planck Constant

planck

6.6260693E-34*J*s (approximate)

Planck Constant over 2 pi

planck2pi

planck/(2*pi)

Planck Length

planck_length / l_P

1.61624E-35*m (approximate)

Planck Mass

planck_mass / m_P

2.17645E-5*g (approximate)

Planck Temperature

planck_temperature / T_P

1.41679E32*K (approximate)

Planck Time

planck_time / t_P

5.39121E-44*s (approximate)

Speed of Light in Vacuum

c / speed_of_light

299792458*m*s^(-1)