The envelope and basket of a hot-air balloon have a
Chapter , Problem 69(choose chapter or problem)
The envelope and basket of a hot-air balloon have a combined weight of 2.45 kN, and the envelope has a capacity (volume) of 2.18 ' 103 m3 . When it is fully inflated, what should be the temperature of the enclosed air to give the balloon a lifting capacity (force) of 2.67 kN (in addition to the balloons weight)? Assume that the surrounding air, at 20.0-C, has a weight per unit volume of 11.9 N/m3 and a molecular mass of 0.028 kg/mol, and is at a pressure of 1.0 atm.
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