| Acceleration of gravity |  |
| Density of air (STP) |  = |
| STP Standard Temperature and Pressure |
  |
| Escape velocity | 1.12*104 m/sec = 6.95 miles/sec |
| Centripetal accelaration | a = v2/r (linear speed of the body)2/radius of rotation |
| Sphere |   |
| Torus R=Major (rotation) Radius r=Minor radius |
  |
| Cylinder R=Radius, L=Length |
  |
| Mass of the earth | 5.98*1024 kg |
| Volume of the earth | 1.087*1021 m^3 = 3.84*10^22 ft^3 |
| Orbital speed of the earth | 2.977*104 m/s = 18.5 miles/s (mean) |
| Earth's rotation | 0.0000116 rpm |
| Solar constant (Solar energy outside Earth's atmosphere) |
 |