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[http://baearnes.angelfire.com/kid-abelha/ kid abelha] [http://eaforbur.angelfire.com/view/belleville-rendez/ belleville rendez vous] [http://omedici.angelfire.com/text/el-za/ el za za za by grupo climax] [http://omedici.angelfire.com/text/rapper-nelly/ rapper nelly] [http://armbreak.angelfire.com/text/reyes-de.htm reyes de francia] [http://hetimmon.angelfire.com/processori-centrino.htm processori centrino] [http://micofer.angelfire.com/small/audi-a.htm audi a3 2000] [http://thjulia.angelfire.com/articles/asus-psvm.htm asus p5s800vm] [http://thjulia.angelfire.com/articles/novela-gitanas.htm novela gitanas] '''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. |
− | The Mach number is commonly used both with objects | + | 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 | + | 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. | The Mach number is named after Austrian physicist and philosopher Ernst Mach. | ||
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A longer and more technical version of the article on [[w:Mach (speed)|Wikipedia ]] | A longer and more technical version of the article on [[w:Mach (speed)|Wikipedia ]] | ||
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[[Category:Glossary]] | [[Category:Glossary]] | ||
[[Category:Aerodynamics]] | [[Category:Aerodynamics]] |