User:Jmesserly/energy conversion


 * 1 watt = 1 Joule per second
 * 1 Kilowatt hour = 3.6 MJoules
 * 1 Kilowatt hour = 3,412 Btu
 * One joule is the amount of energy needed to lift one pound about nine inches

BTU

 * 1 gallon of gasoline = 124,000 Btu
 * 1 joule = 251.9 calories
 * = 778.26 foot-pounds
 * = 1055 joules
 * = 107.5 kilogram-meters
 * = 0.0002928 kilowatt-hours

MPG, Gasoline equivalencies

 * 1 gallon of gasoline is equivalent to 10 KWHs of electricity from the grid, regardless of weight class- according to calcars site.

Buoyancy

 * ratio of densities = ratio of weights, so
 * Density of steel (DS) / density of water (DW) = land weight of steel (W) / weight - apparent weight in water (WWater)
 * DS/DW = W/W-WWater
 * W-WWater = DW * W / DS
 * WWater = W - W * DW / DS
 * Density Steel = 7.85 g/cm3, Density water is 1 gm/cm3
 * WWater = .8726 Weight on land