| c |
speed of light in a vacuum |
299,792,458 m/s |
| G |
gravitational constant |
6.67430\times10^{-11} N m2/kg2 |
| h |
planck constant |
6.62607015\times10^{−34} J\cdots = 4.135667696\times10^{−15} eV\cdots |
| hc |
hc |
1.986445857\times10^{−25} J\cdotm = 1239.841984 eV\cdotnm |
| \hbar |
reduced planck constant |
1.054571817\times10^{−34} J\cdots = 6.582119569\times10^{−16} eV\cdots |
| e |
elementary charge |
1.602176634\times10^{−19} C |
| \varepsilon_0 |
electric constant |
8.8541878128\times10^{−12} C2/N\cdotm2 |
| \mu_0 |
magnetic constant |
1.25663706212\times10^{−6} T\cdotm/A |
| N_A |
avogadro constant |
6.02214076 \times10^{23} 1/mol |
| k_B |
boltzmann constant |
1.380649\times10^{−23} J/K= 8.617333\times10^{-5} eV/K |
| R=N_Ak_B |
gas constant |
8.314462618 J/mol\cdotK |
| m_{\mu} |
atomic mass constant |
1.66053906660\times10^{−27} kg = 1 u |
| m_e |
electron mass |
9.1093837015\times10^{−31} kg = 5.48579909065\times10^{-4}\ u |
| m_p |
proton mass |
1.67262192369\times10^{−27} kg = 1.007276466621 u |
| m_n |
neutron mass |
1.67492749804\times10^{−27} kg =1.00866491595 u |
| g |
standard gravity |
9.80665 m/s2 |
| atm |
standard atmosphere |
101,325 Pa |