/ibisams/modAbis/view.phphid-4546324 o14 t 18 Map Sapling Learning In 1923the Un

Question

/ibisams/modAbis/view.phphid-4546324 o14 t 18 Map Sapling Learning In 1923the United States Army (there was no U.S Air Force at that time) set a record for in-flight refuel ng of airplanes. Using two refueling planes, an Airco p DH-48 biplane was able to remain in flight for 37 hours the flight, the refueling planes were able to air-transfer a total of 687 gallons of fuei to the plane in 9 transfers Assume that the refueing nozzle had a diameter of 1.25 inches and each refueling took 2.51 minutes to perform. Calculate the velocity of the fuel through the nazzle. Assume that the fuel filled the entire cross- sectional area of the nozzle. Number m m/s Tools 101 O Previous 9 Check Answer Next Exit Hint aboút us careers privacy policy ter up

Explanation / Answer

d =1.25 inches = 0.03175 m

volume of fuel = A v t

V = 687 galloons = 2.60 m3

A = pi r2 = pi * (0.03175 / 2)2 = 7.92 * 10-4 m2

t = 2.51 * 60 * 9 = 1355.4 s

2.60 = 7.92 * 10-4 * v * 1355.4

v = 2.60 / (7.92 * 10-4 * 1355.4)

v = 2.42 m/s

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