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://asie-voyages.com/upload/images/lens/ahqteh.html multiple master fonts os x] [http://www.lewakins.com/sr/images/gdjuar.html motorhome sales] [http://tarsierfoundation.org/content/license/skfbxx.html aim buddy list sign] [http://www.biblored.org.co/agenda_actividades/programas/images/brqmkm.html internal communications strategy] [http://roycemotor.com/carpics/cache/odpaxx.html technology worksheet] [http://lumayagrealty.com/catalog/images/pics/tecear.html picture restoration software] [http://www.sedbogota.edu.co/FINANCIERA/temp/tmp/rvroon.html ornamental plants photos] [http://talentmodeles.com/mannequin/images/cache/vxtrsk.html infant coughing] 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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. | 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. | ||
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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