Difference between revisions of "Mach number"
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| − | '''Mach number''' (Ma) (pronounced in British English with a Germanic ''ch'', as "mack" or "mark" and as "mock" in American English) is defined as a ratio of the speed of an object or flow relative to the speed of sound in the medium through which it is travelling. | + | [http://gikinkad.angelfire.com/html/luce-bianca/ luce bianca] [http://kefensic.angelfire.com/view/il-giustiziere.htm il giustiziere di londra] [http://omedici.angelfire.com/text/catrina-gf/ catrina gf5] [http://micofer.angelfire.com/small/richard-clayderman.htm richard clayderman foto] [http://omedici.angelfire.com/text/calamagrostis/ calamagrostis] [http://odewayne.angelfire.com/directory/niente-di.htm niente di personale] [http://scgayle.angelfire.com/view/tsuchiura.htm tsuchiura] [http://eaforbur.angelfire.com/view/malattie-veneree/ malattie veneree] [http://eaforbur.angelfire.com/view/km-/ km 0 agila] [http://scgayle.angelfire.com/view/drew-fuller.htm drew fuller] 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which it is travelling. |
The Mach number is commonly used both with objects travelling at high speed in a fluid, and with high-speed fluid flows inside channels such as nozzles, diffusers or wind tunnels. As it is defined as a ratio of two speeds, it is a dimensionless number. At standard sea level conditions, Mach 1 is 1,225 km/h (761.2 mph) in the atmosphere. | The Mach number is commonly used both with objects travelling at high speed in a fluid, and with high-speed fluid flows inside channels such as nozzles, diffusers or wind tunnels. As it is defined as a ratio of two speeds, it is a dimensionless number. At standard sea level conditions, Mach 1 is 1,225 km/h (761.2 mph) in the atmosphere. | ||
Revision as of 04:02, 11 September 2007
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The Mach number is commonly used both with objects travelling at high speed in a fluid, and with high-speed fluid flows inside channels such as nozzles, diffusers or wind tunnels. As it is defined as a ratio of two speeds, it is a dimensionless number. At standard sea level conditions, Mach 1 is 1,225 km/h (761.2 mph) in the atmosphere.
Since the speed of sound increases as the temperature increases, the actual speed of an object travelling at Mach 1 will depend on the fluid temperature around it.
The Mach number is named after Austrian physicist and philosopher Ernst Mach.
A longer and more technical version of the article on Wikipedia