Properties of Typical Gaseous Fuels2 Calorific value Type of gas Btu/ft3 kcal/m3 Gross Net Gross Net Acetylene, commercial 1410 1360 12,548 12,105 Blast furnace 92 91 819 819 Blue (water), bituminous 260 239 2314 2127 Butane, commercial, natural gas 3210 2961 28,566 26,350 Butane, commercial, refinery gas 3184 2935 28,334 26,119 Carbureted blue, low gravity […]

The efficiency of motor vehicles in the United States is commonly expressed in miles per U. S. gallon, while in most other countries it is expressed in liters per one hundred kilometers. To convert fuel economy stated in miles per U. S. gallon to fuel consumption expressed in L/(100 km), divide 235.215 by the numerical […]

Source: U. S. National Institute of Standards and Technology 2.1 Introduction Section 4.6 gives factors for converting values of quantities expressed in various units—predominantly units outside the SI that are unacceptable for use with it—to values expressed either in (a) SI units, (b) units that are accepted for use with the SI (especially units that […]

Greek alphabet A a alpha і 1 iota p q rho B b beta K К kappa R r 1 sigma Г c gamma Л k lambda T s tau D 5 S delta M i mu Y t upsilon E £ epsilon N V nu U / u phi Z f zeta N n […]

The creation of the decimal metric system at the time of the French Revolution and the subsequent deposi­tion of two platinum standards representing the meter and the kilogram, on June 22, 1799, in the Archives de la Ripublique in Paris can be seen as the first step in the development of the present International System […]

Meter The meter is the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second. Kilogram The kilogram is the unit of mass; it is equal to the mass of the international prototype of the kilogram. Second The second is the duration of 9,192,631,770 periods of the […]

Because of existing practice in certain fields or countries, in 1978 the CIPM considered that it was permissible for the units given in Table 7 to continue to be used with the SI until the CIPM considers that their use is no longer necessary. TABLE 7 Units Temporarily Accepted for Use with the SI Name2 […]

1. GUIDE TO THE USE OF THE INTERNATIONAL SYSTEM OF UNITS Source: U. S. National Institute of Standards and Technology The International System of Units was established in 1960 by the 11th General Conference on Weights and Measures (CGPM). Universally abbreviated SI (from the French Le Systeme International d’Unites), it is the modern metric system […]