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We often see word mach for the Speed of aircraft . What is a mach number? Find out the correct answer from the options given Below
One mach is equal to the speed of sound
It equal to the speed of light
It is equal to speed of1000m/s
It is equal to the escape velocity
1st option is correct. Mach is the ratio of the speed of a body to the speed of sound in the surrounding medium. It is often used with a numeral (as Mach 1, Mach 2, etc.) to indicate the speed of sound, twice the speed of sound, etc.
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