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British thermal unit (BTU) – equal to the energy need to raise the temperature of one pound of water by one degree Fahrenheit (~1055 J). Therm (thm) – unit of heat energy. In the US gas industry it is defined as exactly 100,000 BTU 59 °F. It is approximately the heat equivalent of burning 100 cubic feet (2.8 m 3) of natural gas (~105.5 MJ).
Nuclear energy – energy in the nucleus or core of atoms [1] Nuclear fusion; Nuclear reactor; Nuclear reprocessing; Oil drilling; Oil platform; Oil refinery; Oil shale; Oil well; Osmotic power – or salinity gradient power – is the energy available from the difference in the salt concentration between seawater and river water. OTEC ...
Earth's energy budget (or Earth's energy balance) is the balance between the energy that Earth receives from the Sun and the energy the Earth loses back into outer space. Smaller energy sources, such as Earth's internal heat, are taken into consideration, but make a tiny contribution compared to solar energy.
8.5×10 3 J Kinetic energy of a regulation baseball thrown at the speed of sound (343 m/s = 767 mph = 1,235 km/h. Air, 20°C). [101] 9×10 3 J: Energy in an alkaline AA battery [102] 10 4 1.7×10 4 J: Energy released by the metabolism of 1 gram of carbohydrates [103] or protein [104] 3.8×10 4 J: Energy released by the metabolism of 1 gram of ...
Energy stored through solid to liquid phase change of silicon [88] Strontium bromide hydrate: 0.814 [89] 1.93 628 Thermal energy of phase change at 88.6 °C (361.8 K) Liquid nitrogen: 0.77 [90] 0.62 213.9 172.2 Maximum reversible work at 77.4 K with 300 K reservoir Compressed air at 30 MPa (4,400 psi) 0.5 0.2 138.9 55.6 Potential energy
The word energy derives from the Ancient Greek: ἐνέργεια, romanized: energeia, lit. 'activity, operation', [4] which possibly appears for the first time in the work of Aristotle in the 4th century BC. In contrast to the modern definition, energeia was a qualitative philosophical concept, broad enough to include ideas such as happiness ...
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It provides teachers with free lessons and resources for pupils aged from 4 to 16, from reception to year 11. [1] Oak also includes a specialist curriculum for supporting pupils who normally attend specialist settings. [2] Oak was created in response to the 2020 United Kingdom education shutdown during the COVID-19 pandemic. [3]