Ernst Mach Ernst Mach Ernst Waldfried Josef Wenzel Mach (; ; 18 February 1838 – 19 February 1916) was an Austrian physicist and philosopher, noted for his contributions to physics such as study of shock waves. The ratio of one's speed 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. Through his criticism of Newton's theories of space and time, he foreshadowed Einstein's theory of relativity. Ernst Waldfried Josef Wenzel Mach was born in Chrlice (), Moravia (then in the Austrian empire, now
Mach Five Mach Five The is the racing car Speed Racer (Go Mifune in the Japanese version) drives in the anime series of the same name (known as ""Mach Go! Go! Go!"" in Japan). The car was designed, built, and created by "Pops Racer" (Daisuke Mifune), Speed Racer's father. It features a set of special devices which Speed Racer uses throughout the series. In the original 1967 series, the Mach Five is a white racing car with an "M" written on its hood (which does not stand for "Mach 5", but instead stands for "Mifune", both Go's last name, and the name