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Mach number - Wikipedia The Mach number (M or Ma), often only Mach, ( mɑːx ; German: [max]) is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound [1][2] It is named after Austrian physicist and philosopher Ernst Mach
Mach number | Description Facts | Britannica Mach number, in fluid mechanics, ratio of the velocity of a fluid to the velocity of sound in that fluid, named after Ernst Mach (1838–1916), an Austrian physicist and philosopher
Role of the Mach Number - Glenn Research Center | NASA The Mach number is the ratio of the speed of the aircraft, or the speed of the gas, to the speed of sound in the gas The speed of sound is equal to the speed of transmission of small, isentropic disturbances in the flow
What is Mach Number? - AviationHunt The Mach number (M) is a dimensionless unit representing the ratio of an object’s speed to the speed of sound in the medium through which it moves Named after Austrian physicist Ernst Mach, it’s a fundamental concept in high-speed travel, particularly in aviation and astronautics