|
Mathematical and other constants |
|
|
|
Written by Garfield Lucas
|
This is a small collection of constants that might come in handy. These were collected in the days before Google. So it is possible to obtain more accurate numbers on line. But I rather like having them in one place. Besides, they work on my old sliderule just fine!
| Constant | Abreviation | Value | Units | | Pi | p | 3.14159265 | | | e | e | 2.71828183 | |
| | | | | Absolute zero (0 Kelvin) | | -273.160000 | Celsius | | Acceleration due to Earth's gravity | a | 9.81 | metres/second² | | Avogadro's number | N | 6.02E-023 | molecules/mole | | Electronic charge | e | 1.60E-019 | coulombs | | Electron, mass of | m | 9.11E-031 | kg | | Electron, charge/mass ratio | e/m | 1.76E+011 | coulombs/kg | | Electron, radius of | r | 2.19E-015 | metres | | Faraday's Constant | F | 66487 | C/mole | | Gas Constant | R | 8.31E+000 | j/K/mole | | Gravitational constant | G | 6.67E-011 | Newtons metres²/kg | | Latent heat of evaporation of water | | 2.26E+006 | joules/kg | | Latent heat of fusion of ice | | 333400 | joules/kg | | Mechanical equivalent of heat | | 4.18 | joules/calorie | | Plank's constant | h | 6.63E-034 | joules seconds | | Velocity of sound at STP | | 343.6 | metres/second | | Velocity of light in vacuo | c | 299792500 | metres/second |
| | | | | Radius of Planet Earth | | 6378100 | metres | | Geostationary Orbit | | 35786000 | metres | |
|
Last Updated ( 2008-01-10 03:24 UTC )
|
Tools 
