URGENT Gas laws and balloons? Lift? Other stuff? URGENT? - Freemason Hirams Travels Masonic Forums

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03-28-2008, 03:55 PM

FAIL

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URGENT Gas laws and balloons? Lift? Other stuff? URGENT?

"Investigate some of the technicalities of ballooning on the basis of the perfect gas law. Suppose your balloon has a radius of 3 m and that it is a sphere when inflated. How mush hydrogen is needed to inflate it to a pressure of 1 atm at an ambient temperature of 25C at sea level? What mass can the balloon lift at sea level, where the density of air is 1.22kg m^-3? What would be the payload if helium were used instead of hydrogen? With a fixed weight, the balloon ascends to 30 000 ft where the pressure is .28 atm, the temperature -43C, and the density of air .43kg m^-3. Can tyou infact attain that height with both hydrogen and helium? Do you need more hydrogen to rise further?

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