Q: The place where a river meets the sea is called a(n) __________. A. estuary B. isthmus C. escarpment D. peninsula. A: Place where river meets sea is estuary. Log in to see link for more information.
Although The Guinness Book of Records recorded the XF-84H as the fastest propeller-driven aircraft ever built, with a design top speed of 670 mph (1,080 km/h) (Mach 0.9) and 623 mph (1,003 km/h) (Mach 0.83) during tests, this claim has been disputed.
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.