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≈ 1 British thermal unit (BTU), depending on the temperature [59] 1.4×10 3 J: Total solar radiation received from the Sun by 1 square meter at the altitude of Earth's orbit per second (solar constant) [93] 2.3×10 3 J: Energy to vaporize 1 g of water into steam [94] 3×10 3 J: Lorentz force can crusher pinch [95] 3.4×10 3 J
By comparison Sinel'nikov powder is a powder in a vacuum, gran sizes range from 100 to 200 micrometers, the powder density is 1.35 g per cm −3. Sinel'nikov, N.N. and Filipovich, V.N., Soviet Phys. Tech., 3, 193–6, 1958. The TPRC record is blurred up some on the Sinel'nikov vacuum which looks like it is probably 5 ⋅ 10 −5 mmHg.
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.
A Assuming an altitude of 194 metres above mean sea level (the worldwide median altitude of human habitation), an indoor temperature of 23 °C, a dewpoint of 9 °C (40.85% relative humidity), and 760 mmHg sea level–corrected barometric pressure (molar water vapor content = 1.16%).
The energy content of ethanol is 76,100 BTU/US gal (5.89 kilowatt-hours per litre), compared to 114,100 BTU/US gal (8.83 kWh/L) for gasoline. (see chart above) A flex-fuel vehicle will experience about 76% of the fuel mileage MPG when using E85 (85% ethanol) products as compared to 100% gasoline. Simple calculations of the BTU values of the ...
In the United States, the efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER) which is defined by the Air Conditioning, Heating, and Refrigeration Institute, a trade association, in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment. [1]
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