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A.Word.A.Daywith Anu Garg
noun: A number indicating the ratio of the speed of an object to the speed of sound in the surrounding medium. So a plane moving at twice the speed of sound is traveling at Mach 2. Also known as mach number.
After Ernst Mach, physicist and philosopher (1838-1916).
"While the world knew one version of Chuck (Yeager) -- a World War II
fighter pilot, first man to surpass Mach 1 speed at 700 mph, a Vietnam
combat commander and central character in the 1983 movie 'The Right Stuff'
-- Cody knew another."
"Zebras and giraffes cross our path at a gallop, anxious to get out of
the way as the jeep hits about 20 mph, which feels like Mach speed in an
Presents, I often say, endear absents. -Charles Lamb, essayist and critic (1775-1834)