Source: wikibot/ludwig-mach
= Ludwig Mach
{wiki=Ludwig_Mach}
Ludwig Mach refers to the Mach number, a dimensionless quantity used in fluid dynamics to represent the ratio of the speed of an object moving through a fluid (usually air) to the speed of sound in that fluid. The Mach number is named after the Austrian physicist Ernst Mach, who studied the behavior of gases at high speeds.