| Composition of Air | ||
| NAME | SYMBOL | VALUE |
| Nitrogen | N2| 78.084 % | |
| Oxygen | O2| 20.9476 % | |
| Argon | Ar | 0.934 % |
| Carbon Dioxide | CO2| 0.0314 % | |
| Neon | Ne | 0.001818 % |
| Methane | CH4| 0.0002 % | |
| Helium | He | 0.000524 % |
| Krypton | Kr | 0.000114 % |
| Hydrogen | H2| 0.00005 % | |
| Xenon | Xe | 0.0000087 % |
| What's New | |
| RC Circuit | 12/04/09 |
| Frequencies of Musical Notes | 11/14/09 |
| Dot Product | 11/12/09 |
| Cross Product | 11/12/09 |
| Pythagorean Theorem | 11/11/09 |
| Composition of Air | 11/11/09 |
| Quadratic Formula | 11/10/09 |
| Two Pulley System | 11/09/09 |
| Gravitational Force | 11/09/09 |
| Surface Area of A Cylinder | 11/09/09 |