How Do They Further Cool Liquid Helium After Liquefaction?
2010年12月17日 · Liquid helium is one of the most efficient cooling methods available, as it can reach extremely low temperatures. However, it is also expensive and requires specialized …
Liquid Nitrogen vs. Liquid Helium - Physics Forums
2005年10月3日 · In summary, liquid nitrogen and liquid helium are both cryogenic liquids with different boiling points and properties. Liquid helium is colder and more expensive than liquid …
Calculating the boil-off rate of liquid helium - Physics Forums
2016年5月8日 · The boil-off rate of liquid helium can be calculated using the following formula: R = (V x H)/T, where R is the boil-off rate in liters per hour, V is the volume of liquid helium in …
Low-Temp Liquid Helium System: Evaporation Heat & Temperature
2019年12月28日 · A low-temp liquid helium system is a specialized device used in scientific research to maintain extremely low temperatures, typically below -269 degrees Celsius. It is …
Transfer of Heat: mass of liquid helium that boils? - Physics Forums
2005年11月23日 · The question being asked is what mass of liquid helium will boil away through the venting valve in 19.2 hours, given the specific heat and latent heat of vaporization for …
Transferring Liquid Helium to Another Container - Physics Forums
2015年3月28日 · I have a small 'cryostat' which I would like to fill with liquid helium to conduct an experiment. It consists of a circular plastic kitchen measuring cup 3 inches wide at the top, 2 …
What does liquid helium look like? - Physics Forums
2003年12月25日 · Liquid helium is a colorless and transparent liquid with a very low boiling point of -452.1 degrees Fahrenheit (-269 degrees Celsius). At this temperature, it appears as a …
Liquid helium's unusual properties - Physics Forums
2003年3月17日 · Liquid helium has a boiling point of -452.1 degrees Fahrenheit, which is only 4.2 Kelvin. This is the lowest boiling point of any known substance. It is so low because helium is …
Polarizability of Liquid Helium - Physics Forums
2008年3月4日 · Helium Liquid In summary, the polarizability of liquid helium is its ability to be polarized by an electric field and is directly related to its density. This property is important in …
How much does liquid helium cost - Physics Forums
2004年8月26日 · While liquid helium is the most commonly used coolant for low-temperature applications, there are some alternatives available, such as liquid nitrogen and cryocoolers. …