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The Mach number (M or Ma), often only Mach, (/ m ɑː k /; German:) is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound. [1] [2] It is named after the Austrian physicist and philosopher Ernst Mach. =, where: M is the local Mach number,
1CC Abbreviation of one-credit completion or one-coin clear. To complete an arcade (or arcade-style) game without using continues. [1]1-up An object that gives the player an extra life (or attempt) in games where the player has a limited number of chances to complete a game or level.
IEC 61000-4-5 is an international standard by the International Electrotechnical Commission on surge immunity. In an electrical installation, disruptive surges can appear on power and data lines.
1 m – approximate height of the top part of a doorknob on a door; 1 m – diameter of a very large beach ball; 1.29 m – length of the Cross Island Chapel, the smallest church in the world; 1.4 m – length of a Peel P50, the world's smallest car; 1.435 m – standard gauge of railway track used by about 60% of railways in the world = 4 ft 8 ...
For example, to calculate the dynamics of a billiard ball being struck, one can approximate the force of the impact by a Dirac delta. In doing so, one not only simplifies the equations, but one also is able to calculate the motion of the ball, by only considering the total impulse of the collision, without a detailed model of all of the elastic ...
How It's Made is a documentary television series that premiered on January 6, 2001, on the Discovery Channel in Canada and Science in the United States. The program is produced in the Canadian province of Quebec by Productions MAJ, Inc. and Productions MAJ 2.
Calculator (programmable): the Programma 101, one of the first desktop electronic programmable calculators, was designed by a small team led by Pier Giorgio Perotto of Olivetti, between 1962 and 1964 and launched in 1965. [49] [50] Dipped candle: Romans made candles using rendered animal fat (called tallow), beginning around 500 BC. [51]
Widnes (/ ˈ w ɪ d n ə s / WID-nəss) is an industrial town in the Borough of Halton, Cheshire, England, which at the 2021 census had a population of 62,400. [1]Historically in Lancashire, it is on the northern bank of the River Mersey where the estuary narrows to form the Runcorn Gap.