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Helium flash. Fusion of helium in the core of low-mass stars. A helium flash is a very brief thermal runaway nuclear fusion of large quantities of helium into carbon through the triple-alpha process in the core of low-mass stars (between 0.8 solar masses ( M☉) and 2.0 M☉[ 1]) during their red giant phase. The Sun is predicted to experience ...
For Monroney fuel economy the equation is. where. is expressed as miles per gallon gasoline equivalent (as shown in the Monroney label) E G = {\displaystyle E_ {G}=} energy content per gallon of gasoline = 115,000 Btu /gallon, as set by U.S. DoE and reported by the Alternative Fuel Data Center.
Sudarsky's classification of gas giants for the purpose of predicting their appearance based on their temperature was outlined by David Sudarsky and colleagues in the paper Albedo and Reflection Spectra of Extrasolar Giant Planets [1] and expanded on in Theoretical Spectra and Atmospheres of Extrasolar Giant Planets, [2] published before any successful direct or indirect observation of an ...
University of Warwick astronomers have discovered (via ScienceNews) what they say is the first known exposed gas giant core. TOI-849b is a planet about 730 light-years away that’s close to ...
A gas giant is a giant planet composed mainly of hydrogen and helium. [ 1] Jupiter and Saturn are the gas giants of the Solar System. The term "gas giant" was originally synonymous with "giant planet". However, in the 1990s, it became known that Uranus and Neptune are really a distinct class of giant planets, being composed mainly of heavier ...
Helium-3. Helium-3 ( 3He[ 1][ 2] see also helion) is a light, stable isotope of helium with two protons and one neutron. (In contrast, the most common isotope, helium-4, has two protons and two neutrons.) Other than protium (ordinary hydrogen ), helium-3 is the only stable isotope of any element with more protons than neutrons.
The flash point is a descriptive characteristic that is used to distinguish between flammable fuels, such as petrol (also known as gasoline ), and combustible fuels, such as diesel . It is also used to characterize the fire hazards of fuels. Fuels which have a flash point less than 37.8 °C (100.0 °F) are called flammable, whereas fuels having ...
1. Safeway. Safeway grocery stores offer fuel discounts through the Safeway for U rewards program. For every $100 you spend on groceries you get 10 cents off per gallon. You can stack rewards up ...