MACH NUMBER


Meaning of MACH NUMBER in English

transcription, транскрипция: [ ˈmäk- ]

noun

Etymology: Ernst Mach died 1916 Austrian physicist

Date: 1937

: a number representing the ratio of the speed of a body (as an aircraft) to the speed of sound in a surrounding medium (as air)

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.