Physical Constants (four significant figures)
|
| Gravitational constant |
G |
6.673 × 10-11 N*m2/kg2 |
|
| Avogadro's number |
NA |
6.022 × 1023/mol |
|
| Boltzmann's constant |
k |
1.381 × 10-23 J/K |
|
| Gas constant |
R = NAk |
8.314 J/mol*K |
= 8.206 × 10-2 L*atm/mol*K |
| pi |
π |
3.142 |
|
| Coulomb's law constant |
1/(4*π*e0) |
8.988 × 109 N*m2/C2 |
use: 9 × 109 N*m2/C2 |
| Ampere's law constant |
µ0 |
4*pi × 10-7 N/A2 |
by definition |
| Speed of light |
c |
2.998 × 108 m/s |
use: 3 × 108 m/s2 |
| Electron mass |
me |
9.110 × 10-31 kg |
= 0.5111 MeV/c2 |
| Proton mass |
mp |
1.673 × 10-27 kg |
= 938.3 MeV/c2 |
| Neutron mass |
mn |
1.674 × 10-27 kg |
= 939.6 MeV/c2 |
| Unified mass unit |
u |
1.661 × 10-27 kg |
= 931.5 MeV/c2 |
| Elementary charge |
e |
1.602 × 10-19 C |
|
| Planck's constant |
h |
6.626 × 10-34 J*s |
= 4.136 × 10-15 eV*s |
| Stephan-Boltzmann constant |
σ |
5.671 × 10-8 W/(m2*K4) |
|
| Bohn radius |
a0 |
5.292 × 10-11 m |
|
| Compton wavelength |
λC = h/2*π*me*c |
2.426 × 10-12m |
|
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