Inside
Constants
Plans may use these constants without the question stating them.
| Name | Symbol | Value | Unit | Source |
|---|---|---|---|---|
| boltzmann constant | k_B | 1.38065e-23 | J/K | Exact by SI definition (2019); CODATA 2022 (NIST) |
| coulomb constant | k_e | 8.98755e+09 | N*m^2/C^2 | 1/(4 pi epsilon_0) from the CODATA 2022 vacuum electric permittivity (NIST) |
| elementary charge | e | 1.60218e-19 | C | Exact by SI definition (2019); CODATA 2022 (NIST) |
| gravitational constant | G | 6.6743e-11 | m^3/(kg*s^2) | CODATA 2022 recommended values (NIST) |
| magnetic constant | mu_0 | 1.25664e-06 | N/A^2 | Vacuum magnetic permeability, CODATA 2022 recommended values (NIST) |
| molar gas constant | R | 8.31446 | J/(mol*K) | Exact (N_A * k_B, truncated to 10 significant figures); CODATA 2022 (NIST) |
| planck constant | h | 6.62607e-34 | J*s | Exact by SI definition (2019); CODATA 2022 (NIST) |
| speed of light | c | 2.99792e+08 | m/s | Exact by SI definition; CODATA 2022 (NIST) |
| standard atmosphere | atm | 101325 | Pa | Defined value (10th CGPM, 1954) |
| standard gravity | g | 9.80665 | m/s^2 | Defined value (3rd CGPM, 1901); CODATA 2022 (NIST) |
| stefan boltzmann constant | sigma | 5.67037e-08 | W/(m^2*K^4) | Exact (derived from the exact SI defining constants); CODATA 2022 (NIST) |