2 sentences with “mach”

Short, simple sentences with “mach”, suitable for school kids, with common collocations and related words.

Brief definition: mach

Mach is a unit that measures speed compared to the speed of sound. Mach 1 equals the speed of sound, about 767 miles per hour (1235 km/h) at sea level. Speeds faster than sound are described as Mach 2, Mach 3, and so on.


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For an aircraft to enter low Earth orbit, it needs to reach orbital velocity, mach 25, i.e. 25 times the speed of sound.
So far the X-15 is the only aircraft to achieve supersonic speed (more than six times the speed of sound) when it reached the all-time record of mach 6.7 in 1967.

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