On a perfect fall day, you are hovering at a low altitude in a hot-air balloon, accelerated neither upward nor downward. The total weight of the balloon, including its load and the hot air in it, is 12000 N.

What is the volume of the displaced air in units of m3? (Use 1.2 kgm3 for the density of air)

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  1. v = 12000 / (9.8 * 1.2) ... m^3

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