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20 June, 15:33

A hot air balloon has a volume of 65,00 cubic feet of hot air. The balloon is at sea level on a standard day. If the temperature of the hot air in the balloon is 1100F, determine the lifting force of the balloon.

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  1. 20 June, 15:57
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    If you heat that air by 100 degrees F, it weighs about 7 grams less. Therefore, each cubic foot of air contained in a hot air balloon can lift about 7 grams. That's not much, and this is why hot air balloons are so huge - - to lift 1,000 pounds, you need about 65,000 cubic feet of hot air.
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