Molecular MeanFree Path Length Versus Pressure
| Pressure (Torr) | Molecular Data | |||||
|---|---|---|---|---|---|---|
| MeanFree Path Length | OR | Molecules per cm3 | Number of Molecules | Average Rate of Intermolecular Collision | OR | |
| Atmosphere | 1.0 x 10-5 cm | — | 2.5 x 10+19 | 3.0 x 10+23 | 5.0 x 10+09/sec | — |
| 1.0 x 10-3 | 7.0 x 1000 cm | — | 3.3 x 10+13 | 3.5 x 10+17 | 6.5 x 10+03/sec | — |
| 1.0 x 10-8 | 7.0 x 1000 km | 4.38 miles | 3.3 x 10+08 | 3.5 x 10+12 | 6.5 x 10-02/sec | 1 per 15 sec |
| 1.0 x 10-10 | 7.0 x 10+02 km | 438 miles | 3.3 x 10+06 | 3.5 x 10+10 | 6.5 x 10-04/sec | 1 per 25 sec |
| 1.0 x 10-12 | 7.0 x 10+04 km | 438,000 miles | 3.3 x 10+04 | 3.3 x 10+08 | 6.5 x 10-06/sec | 1 per 45 hrs |
| 1.0 x 10-14 | 7.0 x 10+06 km | 4.38 x 10+06 miles | 3.3 x 10+02 | 3.3 x 10+06 | 6.5 x 10-08/sec | 1 per 88 days |
| 1.0 x 10-16 | 7.0 x 10+08 km | 4.38 x 10+08 miles | 3.3 x 10+00 | 3.3 x 10+04 | 6.5 x 10-10/sec | 1 per 51.5 yrs |
