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Hydraulic jump in a rectangular channel, also known as classical jump, is a natural phenomenon that occurs whenever flow changes from supercritical to subcritical flow. In this transition, the water surface rises abruptly, surface rollers are formed, intense mixing occurs, air is entrained, and often a large amount of energy is dissipated.
In June 2018, Gates offered free ebooks, to all new graduates of U.S. colleges and universities, [163] and in 2021, offered free ebooks, to all college and university students around the world. [ 164 ] [ 165 ] The Bill & Melinda Gates Foundation partially funds OpenStax , which creates and provides free digital textbooks. [ 166 ]
Download as PDF; Printable version; ... Mathematics is a field of study that discovers and organizes methods, ... Economists note that real people have limited ...
Wikipedia [c] is a free-content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki software MediaWiki. Wikipedia is the largest and most-read reference work in history, [ 3 ] [ 4 ] and is consistently ranked among the ten most visited websites ; as of December ...
The book was published in April 1988 in the US and in June in the UK, and it proved to be an extraordinary success, rising quickly to the top of best-seller lists in both countries and remaining there for months. [151] [152] [153] The book was translated into many languages, [154] and as of 2009, has sold an estimated 9 million copies. [153]
In music written using the system of major-minor tonality ("keys"), which includes most classical music written from 1600 to 1900 and most Western pop, rock, and traditional music, the key of a piece determines the "home note" or tonic to which the piece generally resolves, and the character (e.g. major or minor) of the scale in use. Simple ...
Muhammad ibn Musa al-Khwarizmi [note 1] (Persian: محمد بن موسى خوارزمی; c. 780 – c. 850), or simply al-Khwarizmi, was a polymath who produced vastly influential Arabic-language works in mathematics, astronomy, and geography.
Ancient Egyptian senet game board inscribed for Amenhotep III with separate sliding drawer, from 1390 to 1353 BC, made of glazed faience, dimensions: 5.5 × 7.7 × 21 cm, in the Brooklyn Museum (New York City). A game is a structured type of play, usually undertaken for entertainment or fun, and sometimes used as an educational tool. [1]