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.
Before the Concorde's retirement it was the fastest passenger plane, cruising at Mach 2.02 (~1320mph). Now the fastest planes are the 787 and A380, optimized for Mach 0.85 (~5 â¦ 67mph).