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  2. United States customary units - Wikipedia

    en.wikipedia.org/wiki/United_States_customary_units

    Troy weight, avoirdupois weight, and apothecaries' weight are all built from the same basic unit, the grain, which is the same in all three systems. However, while each system has some overlap in the names of their units of measure (all have ounces and pounds), the relationship between the grain and these other units within each system varies.

  3. Gasoline gallon equivalent - Wikipedia

    en.wikipedia.org/wiki/Gasoline_gallon_equivalent

    The fuel consumption is an equivalent measure for cars sold outside the United States, typically measured in litres per 100 km traveled; in general, the fuel consumption and miles per gallon would be reciprocals with appropriate conversion factors, but because different countries use different driving cycles to measure fuel consumption, fuel ...

  4. Orders of magnitude (mass) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(mass)

    7–8 × 10 36 kg The supermassive black hole at the center of the Milky Way, associated with the radio source Sagittarius A* (3.7±0.2 × 10 6 M ☉) [165] 8 × 10 36 kg Omega centauri, the largest globular cluster in the Milky Way, containing approximately 10 million stars. 10 37 10 38 10 39 10 40 10 41: 1.98 × 10 41 kg

  5. Metrication in Canada - Wikipedia

    en.wikipedia.org/wiki/Metrication_in_Canada

    When dealing with the US oat markets though, special attention must be paid to the definition of bushel weight because the US uses a Winchester bushel (35.239 litres). [29] In livestock auction markets, cattle are sold in dollars per short hundredweight (cwt; 100 lbs; 45.36 kg), whereas hogs are sold in dollars per hundred kilograms. [citation ...

  6. Ammonia - Wikipedia

    en.wikipedia.org/wiki/Ammonia

    The standard enthalpy change of combustion, ΔH° c, expressed per mole of ammonia and with condensation of the water formed, is −382.81 kJ/mol. Dinitrogen is the thermodynamic product of combustion: all nitrogen oxides are unstable with respect to N 2 and O 2, which is the principle behind the catalytic converter.

  7. Fuel economy in aircraft - Wikipedia

    en.wikipedia.org/wiki/Fuel_economy_in_aircraft

    The payload fraction of modern twin-aisle aircraft is 18.4% to 20.8% of their maximum take-off weight, while single-aisle airliners are between 24.9% and 27.7%. An aircraft weight can be reduced with light-weight materials such as titanium, carbon fiber and other composite plastics if the expense can be recouped over the aircraft's lifetime.

  8. Indian rupee - Wikipedia

    en.wikipedia.org/wiki/Indian_rupee

    In 1850, the official conversion rate between the pound sterling and the rupee was £0 / 2s / 0d (or £1:₹10), while between 1899 and 1914, the official conversion rate was set at £0 to 1s to 4d (or £1:₹15). However, this was just half of market exchange rates between 1893 and 1917.