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A minute of arc is π10 800 of a radian . A second of arc, arcsecond (arcsec), or arc second, denoted by the symbol ″, [2] is 1 60 of an arcminute, 1 3600 of a degree, [1] 1 1 296 000 of a turn, and π648 000 (about 1 206 264.8) of a radian. These units originated in Babylonian astronomy as sexagesimal (base 60) subdivisions of the degree ...
List of file signatures. This is a list of file signatures, data used to identify or verify the content of a file. Such signatures are also known as magic numbers or Magic Bytes. Many file formats are not intended to be read as text. If such a file is accidentally viewed as a text file, its contents will be unintelligible.
The Chernobyl disaster [a] began on 26 April 1986 with the explosion of the No. 4 reactor of the Chernobyl Nuclear Power Plant near the city of Pripyat in the north of the Ukrainian SSR, close to the border with the Byelorussian SSR, in the Soviet Union. [1] It is one of only two nuclear energy accidents rated at seven—the maximum severity—on the International Nuclear Event Scale, the ...
A sharp drop for Facebook’s parent company, one of Wall Street’s most influential stocks, also hurt the market. Meta Platforms, the company behind Facebook and Instagram, dropped 10.6% even ...
The 2002 NBA Finals was the National Basketball Association (NBA)'s championship series for the 2001–02 season. The best-of-seven playoff was contested between the Western Conference champion Los Angeles Lakers (who were also two-time defending NBA champions ), and the Eastern Conference champion New Jersey Nets.
Salvation is an American suspense drama television series, [1] that premiered on July 12, 2017. [2] The series was originally announced as being developed in September 2013, [3] but received its straight-to-series 13-episode order in October 2016.
Sears–Haack body. The Sears–Haack body is the shape with the lowest theoretical wave drag in supersonic flow, for a slender solid body or revolution with a given body length and volume. The mathematical derivation assumes small-disturbance (linearized) supersonic flow, which is governed by the Prandtl–Glauert equation.
A femtosecond is a unit of time in the International System of Units (SI) equal to 10 −15 or of a second; that is, one quadrillionth, or one millionth of one billionth, of a second. [1] For context, a femtosecond is to a second as a second is to about 31.71 million years; a ray of light travels approximately 0.3 μm (micrometers) in 1 femtosecond, a distance comparable to the diameter of a ...
The Global Positioning System ( GPS ), originally Navstar GPS, [2] is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force. [3] It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near ...
The purpose of this page is to focus effort on how to achieve the proposed static ( paper /CD/ DVD) versions of Wikipedia and how to produce a validated selection of Wikipedia articles, called Wikipedia 1.0. All activities are coordinated through the editorial team, which is open to all Wikipedia editors. Items shown in italics are currently active areas for the project.