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propecia] [http://www.rso.cmich.edu/prevet/messageboard/000031ab.htm cheap phentermine] [http://www.forumhosting.org/forum.php?mforum=getcdel cheap nexium] [http://www8.vjc.edu/EnvironmentalClub/discuss/msgReader$110 free polyphonic ringtones] [http://src.moffitt.usf.edu/sf/sfmain/do/downloadAttachment/projects.jaffy/tracker.bug_tracker/artf1029?id=atch1083 cheap paxil] [http://mabelsthecat.blogspot.com affiliate casino online program] '''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 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