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.
It depends on the type of plane. Small, one-engine propeller planes (reciprocating engines) fly at speeds of 80 to 200 mph (130 to 320 km/hr). Jet airliners at cruising altitude average around 500 to 600 mph (800 to 960 km/hr). Military turboprops cruise at 350 mph (560 km/hr) and jet fighters routine exceed the speed of sound (768 mph or 1235 km/hr at sea level).