Introduction to Liquid Helium - NASA
2014年9月11日 · Liquid helium, because of its low boiling point, is used in many cryogenic systems when temperatures below the boiling point of nitrogen are needed. A convenient way to cool many kinds of apparatus is to submerge …
Liquid helium - Vocab, Definition, and Must Know Facts - Fiveable
Liquid helium is a unique state of helium that occurs at extremely low temperatures, specifically below its boiling point of approximately 4.2 K (-268.95 °C). This state exhibits …
Helium | Definition, Properties, Uses, & Facts | Britannica
- helium (He), chemical element, inert gas of Group 18 (noble gases) of the periodic table. The second lightest element (only hydrogen is lighter), helium is a colourless, odourless, and tasteless gas that becomes liquid at −268.9 °C (−452 °F). The boiling and freezing points of helium are lower than those of any other known substance. Helium is the ...
- 发布日期: 1998年7月20日
How is helium turned into a liquid and a superfluid?
How is helium turned into a liquid and a superfluid? - BBC Science Focus Magazine.
Helium - Wikipedia
Helium remains liquid down to absolute zero at atmospheric pressure, but it freezes at high pressure. Solid helium requires a temperature of 1–1.5 K (about −272 °C or −457 °F) at about 25 bar (2.5 MPa) of pressure. [106] It is often …
Understanding Liquid Helium, The Superfluid
2017年3月16日 · Liquid Helium. tl;dr: As a container of liquid helium is cooled past its λ point, a fraction of its particles ‘condense’ and exist in their lowest energy state. This superfluid phase possesses an extremely high heat …
Liquid helium - (Thermodynamics of Fluids) - Fiveable
Liquid helium is a low-temperature liquid formed when helium gas is cooled to below its boiling point of approximately 4.2 Kelvin (-268.95 degrees Celsius). This state of helium exhibits …
Liquid Helium - an overview | ScienceDirect Topics
Liquid Helium refers to a strongly correlated quantum fluid that has been extensively studied in the field of physics. It is known for its unique physical properties and has served as a …
Eighty years of superfluidity - Nature
2018年1月15日 · Eighty years of superfluidity. In 1938, two studies demonstrated that liquid helium-4 flows without friction or viscosity at temperatures close to absolute zero. The finding led to major...
