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Ultra-high vacuum (often spelled ultrahigh in American English, UHV) is the vacuum regime characterised by pressures lower than about 1 × 10 −6 pascals (1.0 × 10 −8 mbar; 7.5 × 10 −9 Torr). UHV conditions are created by pumping the gas out of a UHV chamber.
UHV may refer to: Ultra-high vacuum, the vacuum regime characterised by pressures lower than about 10 −7 pascal; Ultra-high voltage, a classification of overhead power line with an operating voltage of higher than 800 kV; University of Houston–Victoria, a university in Victoria, Texas, US
The langmuir (symbol: L) is a unit of exposure (or dosage) to a surface (e.g. of a crystal) and is used in ultra-high vacuum (UHV) surface physics to study the adsorption of gases. It is a practical unit, and is not dimensionally homogeneous, and so is used only in this field. It is named after American physicist Irving Langmuir.
Watch the Video. Click here to watch on YouTube. Many animals engage in elaborate mating rituals. For flight-ready birds, these often involve complex dance moves and peacock-like displays of grandeur.
"Numb" by Linkin Park was the first 2000s video predating YouTube to reach 1 billion views in November 2018. [59] "Bohemian Rhapsody" by Queen was the first 1970s video (and pre-1990s video) to reach 1 billion views in July 2019. [60] "Sweet Child o' Mine" by Guns N' Roses was the first 1980s video to reach 1 billion views in October 2019. [61]
There are a few foods you may want to skip on Thanksgiving if you're taking a GLP-1 medication such as Ozempic, dietician Kylie Bensley, founder of the women’s nutrition company, Sulinu, tells ...
There are less than 20 days until Christmas but for some Americans, holiday celebrations commence even sooner. While it's not celebrated nationwide, St. Nicholas Day holds a special place for ...
Alternative Influence: Broadcasting the Reactionary Right on YouTube is a 2018 report by researcher Rebecca Lewis published at the think tank Data & Society that performs network analysis on a collection of 65 political influencers on 81 YouTube channels. Lewis argues that this network propagates right-wing ideology.