A SPHERICAL BALOON IS 40 FEET IN DIAMETER AND SURROUNDED BY AIR AT 600F AND 29.92 in Hg abs. (a) If the balloon is filled with hydrogen at a temperature of 700F and atmospheric pressure, what total load can it lift? (b) if it contains helium instead of hydrogen, other conditions remaining the same, what load can it lift? (c) Helium is nearly twice as heavy as hydrogen. Does it have half the lifting force? R for hydrogen is 766.54 and for helium is 386.04 ft.lb/lb0R. Ans. (a) 2381 lb; (b) 2209 lb

A SPHERICAL BALOON IS 40 FEET IN DIAMETER AND SURROUNDED BY AIR AT 600F AND 29.92 in Hg abs. (a) If the balloon is filled with hydrogen at a temperature of 700F and atmospheric pressure, what total load can it lift? (b) if it contains helium instead of hydrogen, other conditions remaining the same, what load can it lift? (c) Helium is nearly twice as heavy as hydrogen. Does it have half the lifting force? R for hydrogen is 766.54 and for helium is 386.04 ft.lb/lb0R. Ans. (a) 2381 lb; (b) 2209 lb

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Description: A SPHERICAL BALOON IS 40 FEET IN DIAMETER AND SURROUNDED BY AIR AT 600F AND 29.92 in Hg abs. (a) If the balloon is filled with hydrogen at a temperature of 700F and atmospheric pressure, what total load can it lift? (b) if it contains helium instead

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

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Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.5P: Evaluate the dimensionless groups hcD/k,UD/, and cp/k for water, n-butyl alcohol, mercury, hydrogen,...

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