Now we are looking on the crossword clue for: BARN.
it’s A 4 letters crossword puzzle definition.
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Possible Answers: GPO.
Last seen on: –USA Today Crossword – Feb 12 2023
-The Telegraph – Quick Crossword – June 21 2018
Universal Crossword – December 17 2017 Sunday
Random information on the term “BARN”:
A barn (symbol: b) is a unit of area equal to 10−28 m2 (100 fm2). Originally used in nuclear physics for expressing the cross sectional area of nuclei and nuclear reactions, today it is also used in all fields of high-energy physics to express the cross sections of any scattering process, and is best understood as a measure of the probability of interaction between small particles. A barn is approximately the cross-sectional area of a uranium nucleus. The barn is also the unit of area used in nuclear quadrupole resonance and nuclear magnetic resonance to quantify the interaction of a nucleus with an electric field gradient. While the barn is not an SI unit, the SI standards body accepts its use with SI units due to its continued use in particle physics.
The etymology of the unit barn is whimsical: during Manhattan Project research on the atomic bomb during World War II, American physicists at Purdue University needed a secretive unit to describe the approximate cross sectional area presented by the typical nucleus (10−28 m2) and decided on “barn.” This was particularly applicable because they considered this a large target for particle accelerators that needed to have direct strikes on nuclei and the American idiom “couldn’t hit the broad side of a barn” refers to someone whose aim is terrible. Initially they hoped the name would obscure any reference to the study of nuclear structure; eventually, the word became a standard unit in nuclear and particle physics.
Random information on the term “GPO”:
The General Post Office (GPO) was officially established in England in 1660 by Charles II and it eventually grew to combine the functions of state postal system and telecommunications carrier. Similar General Post Offices were established across the British Empire. In 1969 the GPO was abolished and the assets transferred to The Post Office, changing it from a Department of State to a statutory corporation. In 1980 the telecommunications and postal sides were split prior to the splitting off of British Telecommunications into a totally separate publicly owned corporation the following year as a result of the British Telecommunications Act 1981. For the more recent history of the postal system in the United Kingdom, see the articles Royal Mail and Post Office Ltd.
Originally, the GPO was a monopoly covering the despatch of items from a specific sender to a specific receiver, which was to be of great importance when new forms of communication were invented. The postal service was known as the Royal Mail because it was built on the distribution system for royal and government documents. In 1661 the office of Postmaster General was created to oversee the GPO.