Short description:
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Reference 1: http://physics.info/shock/ | |
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History:
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historia por francisto.....
Definition:As an object moves through a gas, the gas molecules are deflected around the object. If the speed of the object is much less than the speed of sound of the gas, the density of the gas remains constant and the flow of gas can be described by conserving momentum and energy. As the speed of the object increases towards the speed of sound, we must consider compressibility effects on the gas. The density of the gas varies locally as the gas is compressed by the object
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then M, Mach number, would be M , so if an object move twice time faster that sound speed the Mach number would 2.
Mach Number:
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http://www.grc.nasa.gov/WWW/k-12/airplane/mach.html
Video:
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