어떤 단어든 아래 칸에서 찾아보세요. 예를 들면 "half chub"

1 definition by Snipergod87

 
1.
a speed relative to the speed of sound Mach number is a ratio of the speed of a body (aircraft) to the speed of sound)
Mach is named after Ernst Mach an Austrian philosopher and physicist.
Mach 1 is about 717mph Mach 2 is twice that. The speed of sound varies due to atmospheric conditions and density of the air.
Most commercial airliners fly below Mach 1
Snipergod87가 작성 2006년 05월 11일 (목)