A spherical balloon is 40 ft in diameter and surrounded by air at 60°F and 29.92 in Hg abs.(a) If the balloon is filled with hydrogen at a temperature of 70°F 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?

Question

Vocaloid · Answer

Note to people answering this question: This is *not* a multiple choice question. It is asking for two separate calculations.

imqwerty · Answer

It'll be able to lift a load that's equal to the net upward thrust.
The two forces to consider are buoyant force and the weight of the balloon(gas).
The temp of the gases is given as a clue to calculate their density.