In Ancient Greek, one of the final two or three syllables of a word carries an accent. Each syllable may contain one or two vocalic morae, but only one can be accented; accented morae are pronounced at a higher pitch.
US military to launch fastest-ever plane. By the time you finish reading this sentence, the Falcon HTV-2, the fastest plane ever built, could have flown 18 miles. It would get from London to Sydney in less than an hour, while withstanding temperatures of almost 2,000C, hotter than the melting point of steel.
The F-15 speed is mach 2.5, the Mig 25 is mach 3.2. The Concorde could fly around mach 2, but it's not in use any more. its not the concord. The SR-71 black bird(mach 3 or about 2100mph)is the fastest military jet and the NASA X-43 scramjet(mach 9-10 or about 6300-7000mph) is the fastes unmanned jet. The fastest TRUE JET is the SR-71. The key word is true JET! thats even a bit of strech for the blackbird.