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5 hours ago · At a bare minimum, this implies a primary section that consists of an implosion-type fission bomb (a "trigger"), and a secondary section that consists of fusion fuel. The energy released by the primary compresses the secondary through the process of radiation implosion, at which point it is heated and undergoes nuclear fusion.
5 hours ago · This created the demand for rare tin metal and formed a trade network that linked the distant sources of tin to the markets of Bronze Age cultures. [citation needed] Cassiterite (SnO 2), the oxide form of tin, was most likely the original source of tin. Other tin ores are less common sulfides such as stannite that require a more involved ...
- silvery-white, β (beta); gray, α (alpha)
- group 14 (carbon group)
- 50
- period 5
1 day ago · Renewable energy production from some sources such as wind and solar is more variable and more geographically spread than technology based on fossil fuels and nuclear. While integrating it into the wider energy system is feasible, it does lead to some additional challenges such as increased production volatility and decreased system inertia. [170]
1 day ago · Medical condition Down syndrome Other names Down's syndrome, Down's, trisomy 21 An eight-year-old boy displaying characteristic facial features of Down syndrome Specialty Medical genetics, pediatrics Symptoms Delayed development, characteristic physical features, mild to moderate intellectual disability Usual onset Mostly at conception, rarely after fertilization Duration Lifelong Causes Third ...
- Third copy of chromosome 21
- Mostly at conception, rarely after fertilization
5 hours ago · Name Description Knots Links References trRosettaRNA: trRosettaRNA is an algorithm for automated prediction of RNA 3D structure. It builds the RNA structure by Rosetta energy minimization, with deep learning restraints from a transformer network (RNAformer). trRosettaRNA has been validated in blind tests, including CASP15 and RNA-Puzzles, which suggests that that the automated predictions by ...
5 hours ago · Although many single-syllable morphemes (字; zì) can stand alone as individual words, they more often than not form multi-syllable compounds known as 词; 詞; cí, which more closely resembles the traditional Western notion of a word. A Chinese cí can consist of more than one character–morpheme, usually two, but there can be three or more.
1 day ago · Pennsylvania (/ ˌ p ɛ n s ɪ l ˈ v eɪ n i ə / ⓘ PEN-sil-VAY-nee-ə, lit. 'Penn's forest'), officially the Commonwealth of Pennsylvania (Pennsylvania Dutch: Pennsylvanie), is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States.
