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The Btu should not be confused with the Board of Trade Unit (BTU), an obsolete UK synonym for kilowatt hour (1 kW⋅h or 3,412 Btu). The Btu is often used to express the conversion-efficiency of heat into electrical energy in power plants. Figures are quoted in terms of the quantity of heat in Btu required to generate 1 kW⋅h of electrical energy.
Another difference arises in that Britain deleted the troy pound (373.241 7216 g) and the pennyweight from the relevant statute on 1 January 1879, leaving only the troy ounce (31.103 4768 g) and its decimal subdivisions, whereas the troy pound (of 12 troy ounces) and pennyweight are still legal in the United States, although they are no longer ...
American cooks using British recipes, and vice versa, need to be careful with pints and fluid ounces. A US pint (16 US fluid ounces) is about 16·65 UK fluid ounces or 473 mL, while a UK pint is 20 UK fluid ounces (about 19·21 US fluid ounces or 568 mL): a UK pint is, therefore, about 20% larger than a US pint.
7 pounds: 1 hour and 45 minutes. 8 pounds: 2 hours. 9 pounds: 2 hours and 15 minutes. 10 pounds: 2 ½ hours. 11 pounds: 2 hours and 45 minutes. 12 pounds: 3 hours. 13 pounds: 3 hours and 15 ...
British thermal unit: Btu Btu 1.0 Btu (1.1 kJ) BTU BTU million British thermal units: MMBtu MMBtu 1.0 MMBtu (1.1 GJ) e6BTU BTU British thermal unit (IT) Btu-IT Btu IT ...
The avoirdupois pound is legally defined as a measure of mass, [24] but the name pound is also applied to measures of force. For instance, in many contexts, the pound avoirdupois is used as a unit of mass, but in some contexts, the term "pound" is used to refer to "pound-force". The slug is another unit of mass derived from pound-force.
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The therm (symbol, thm) is a non-SI unit of heat energy equal to 100,000 British thermal units (BTU), [1] and approximately 105 megajoules, 29.3 kilowatt-hours, 25,200 kilocalories and 25.2 thermies. One therm is the energy content of approximately 100 cubic feet (2.83 cubic metres) of natural gas at standard temperature and pressure. However ...