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Hypersonic cruise missiles, which are powered by scramjets, are limited to below 30 km (19 mi); [c] hypersonic glide vehicles can travel higher. Hypersonic vehicles are much slower than ballistic (i.e. sub-orbital or fractional orbital) missiles, because they travel in the atmosphere, and ballistic missiles travel in the vacuum above the ...
A hypersonic weapon is a weapon capable of travelling at hypersonic speed, defined as above Mach 5, or above 5 times the speed of sound. [ 1 ] Below Mach 1, weapons would be characterized as subsonic , and above Mach 1, as supersonic .
Advanced Placement (AP) Human Geography (also known as AP Human Geo, AP Geography, APHG, AP HuGe, APHug, AP Human, HuGS, AP HuGo, or HGAP) is an Advanced Placement social studies course in human geography for high school, usually freshmen students in the US, culminating in an exam administered by the College Board.
Reusable human-rated hypersonic flight is not new. In the 1960s, the X-15 completed over 120 flights above Mach 5 at altitudes surpassing those of typical commercial aircraft. From the 1980s ...
The Hypersonic Air-breathing Weapon Concept, or HAWC, is a joint project between the U.S. Air Force and the Defense Advanced Research Projects Agency (DARPA) to develop and test air-launched ...
A Chinese aerospace firm has completed the first test flight of a passenger plane that it claims can fly at Mach 4 – more than twice the speed of Concorde.. Beijing-based Space Transportation ...
A hypersonic weapon is a weapon capable of travelling at hypersonic speed, defined as between 5 and 25 times the speed of sound or about 1 to 5 miles per second (1.6 to 8.0 km/s). The main article for this category is Hypersonic weapon .
Simulation of hypersonic speed (Mach 5) While the definition of hypersonic flow can be quite vague and is generally debatable (especially due to the absence of discontinuity between supersonic and hypersonic flows), a hypersonic flow may be characterized by certain physical phenomena that can no longer be analytically discounted as in supersonic flow.