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Bohr had an epiphany that the fission at low energies was due to the uranium-235 isotope, while at high energies it was due mainly to the more abundant uranium-238 isotope. [23] The former makes up just 0.7% of natural uranium; while the latter accounts for 99.3%. [ 25 ]
Current methods make it difficult to measure half-lives between approximately 10 −19 and 10 − ... uranium-235: 703.8 22.21 10 9 years 10 15 seconds potassium-40: ...
A further 10 nuclides, platinum-190, samarium-147, lanthanum-138, rubidium-87, rhenium-187, lutetium-176, thorium-232, uranium-238, potassium-40, and uranium-235 have half-lives between 7.0 × 10 8 and 4.83 × 10 11 years, which means they have experienced at least 0.5% depletion since the formation of the Solar System about 4.6 × 10 9 years ...
A 1 inch tall uranium fuel pellet is equivalent to about 1 ton of coal, 120 gallons of crude oil, or 17,000 cubic feet of natural gas. [15] In light-water reactors , 1 kg of natural uranium – following a corresponding enrichment and used for power generation– is equivalent to the energy content of nearly 10,000 kg of mineral oil or 14,000 ...
The Wikipedia CHECKWIKI WPC 111 dump page provides information on Wikipedia articles with potential issues detected by the CheckWiki tool.
Most iron alloys are steels, with carbon as a major alloying element.. Elinvar (nickel, chromium); Fernico (nickel, cobalt); Ferroalloys (Category:Ferroalloys) . Ferroboron ...
On 11 April 2006, Ahmadinejad announced that Iran had successfully enriched uranium in a televised address from the northeastern city of Mashhad, where he said "I am officially announcing that Iran joined the group of those countries which have nuclear technology." The uranium was enriched to 3.5 percent using over a hundred centrifuges.