2019年12月23日 星期一

hypersonic, Mach 5, hypersonic weapon

A hypersonic arms race between America, Russia and China could be on the horizon. One of our most popular articles from 2019 explains why


TBS apologizes for exaggerating theory on hypersonic sounds, memory


 hypersonic
主な意味極超音速の

極超音速の 《音速の 5 倍(以上)の速さにいう; cf. sonic 2》.

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In aerodynamics, a hypersonic speed is one that greatly exceeds the speed of sound, often stated as starting at speeds of Mach 5 and above. The precise Mach number at which a craft can be said to be flying at hypersonic speed varies, since ...

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