hypersonic, Mach 5, hypersonic weapon

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 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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Hypersonic speed - Wikipedia

https://en.wikipedia.org › wiki › Hypersonic_speed

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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 ...