| 1 light-year | a.l. | 9.47E+17 | cm |
| 1 parsec | pc | 3.08E+18 | cm |
| 1 astronomical unit | UA | 1.50E+13 | cm |
| Sun radius | 6.96E+10 | cm | |
| Earth-moon distance | 3.84E+10 | cm | |
| Earth radius | 6.38E+08 | cm | |
| Moon radius | 1.74E+08 | cm | |
| Sun radius | 1.99xE+33 | g | |
| Earth mass | 5.98E+27 | g | |
| Moon radius | 7.35E+25 | g | |
| Earth medium orbital speed | 2.98E+06 | cm/sec |
| Pi | 3.14159 |
| e | 2.718 |
| 1 Rad | 57.296 gradi |
| 1 degree | 0.01745 rad |
| Light speed in vacuum | c | 2.998E+10 | cm/sec |
| Electron charge | e | 4.80E-10 | statC |
| 1.60E-19 | C | ||
| e**2 | 1.44E-13 | MeV cm | |
| Plank constant | h | 6.63E-27 | erg sec |
| 4.14E-15 | eV sec | ||
| Boltzmann constants | k | 1.38xE-16 | erg/K |
| 0.862E-04 | eV/K | ||
| Avogadro number | N | 6.022E23 | 1/mole |
| Electron mass | me | 9.11E-28 | g |
| Proton mass | mp | 1.673E-24 | g |
| 1836.11 | me | ||
| Neutron mass | mn | 1.675E-24 | g |
| Atomic mass unit | 1 UMA | 1.661E-24 | g |
| Gravitational constant | G | 6.673E-8 | dyn cm**2/(g**2) |
| 6.673E-11 | N m**2/(kg**2) | ||
| Gas constant | R | 1.986 | cal/(mole K) |
| 8.314E7 | erg/(mole K) | ||
| 0.0821 | litri atm/(mole K) | ||
| Dielectric constant in vacuum | Epsilon-zero | 8.85E-12 | farad/m |
| Vacuum magnetic permeability | Mu-zero | 12.566E-7 | Wb/(a m) |
| Substance | Mass | Molecular radius | Diffusion coefficient at 20 degrees |
|---|---|---|---|
| H2 | 2 | 5.0e-09 | 2.4e-05 |
| METHANOL | 32 | 9.2E-09 | 1.3E-05 |
| GLUCOSE | 180 | 2.1E-08 | 5.7E-06 |
| ATP | 507 | 4.0E-08 | 3.0E-06 |
| MYOGLOBIN | 17100 | 1.0E-07 | 1.2E-06 |
| HEMOGLOBIN | 64000 | 1.9E-07 | 6.3E-07 |
| CATALASIS | 248000 | 2.9E-07 | 4.1E-07 |