Etymology:
Mach is derived from the German physicist Ernst Mach (1838-1916), who first described the phenomenon in 1883.
Meaning:
Mach is a unit of measure for measuring the speed of an object relative to the speed of sound.
Origin:
Ernst Mach was born in Chirlitz, Moravia, Austria-Hungary (now Brno, Czech Republic). He was a physicist, philosopher, and physiologist who made significant contributions to the field of physics. His research focused on the relationship between the speed of an object and the speed of sound, which led to the development of the Mach number.
The Mach number (Ma) is used to compare the speed of an object to the local speed of sound. It is defined as the ratio of the object's speed to the speed of sound in the surrounding medium:
Ma = v / c
where:
The Mach number is a dimensionless quantity and is often used to describe the performance of aircraft, spacecraft, and other vehicles that travel at high speeds.
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