Cryogenics necessary to use a silicon diode for accuracy. Cryogenics In physics, cryogenics is the production and behaviour of materials at very low temperatures. A person who studies elements that have been subjected to extremely cold temperatures is called a "cryogenicist". It is not well-defined at what point on the temperature scale refrigeration ends and cryogenics begins, but scientists assume a gas to be cryogenic if it can be liquefied at or below . The U.S. National Institute of Standards and Technology has chosen to consider the field of cryogenics as that involving temperatures below . This is a logical dividing
English words first attested in Chaucer English words first attested in Chaucer English words first attested in Chaucer, or special manuscript words of Chaucer, are a set of about two thousand English words that Geoffrey Chaucer is credited as being the first use found today in existing manuscripts. This does not necessarily mean that he was the person to introduce these words into English, but that the earliest extant uses of these words are found in Chaucerian manuscripts. Many of the words were already in everyday speech in 14th-century England (especially London). The claim is that these words are found for the first time in written