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You observe a high-speed aircraft moving overhead at an elevation of 10,000 ft. You hear the...

You observe a high-speed aircraft moving overhead at an elevation of 10,000 ft. You hear the plane 8 sec after it passes directly overhead. Using an air temperature of 40ᵒF, determine the speed of aircraft [ft/sec]. The gas constant of air is 1716 [ft·lbf/slugs·ᵒR].

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