A hot-air balloon stays aloft because hot air at
Chapter 18, Problem 18.55(choose chapter or problem)
A hot-air balloon stays aloft because hot air at atmospheric pressure is less dense than cooler air at the same pressure. If the volume of the balloon is \(500.0 \mathrm{~m}^{3}\) and the surrounding air is at \(15.0^{\circ} \mathrm{C}\), what must the temperature of the air in the balloon be for it to lift a total load of 290 kg (in addition to the mass of the hot air)? The density of air at 15.0C and atmospheric pressure is \(1.23 \mathrm{~kg} / \mathrm{m}^{3}\).
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