Hot air is less dense than cool air, so hot air will rise above cool air. Increasing the air temperature inside a hot air balloon makes it lighter than the surrounding air, so the balloon can lift up. The density of hot air is about 0.25\text{ kg/m}^30.25 kg/m 3 0, point, 25, start text, space, k, g, slash, m, end text, cubed less than that. What is the minimum volume of hot air needed to lift a hot air balloon carrying 800 \text{ kg}800 kg800, start text, space, k, g, end text?
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