Background
Source: Wikipedia
Ernst Waldfried Josef Wenzel Mach ( MAHK; Austrian German: [ˈɛrnst ˈmax] ; 18 February 1838 – 19 February 1916) was an Austrian physicist and philosopher who contributed to the understanding of the physics of shock waves. The ratio of the speed of a flow or object to that of sound is named the Mach number in his honor. As a philosopher of science, he was a major influence on logical positivism and American pragmatism.
