The mass of a hot-air balloon and its cargo (excluding the air inside) is 150 kg. The temperature of the surrounding air is 10.0°C and the pressure is 101 kPa. The volume of the balloon is 300 m3. Find the temperature the air in the balloon must be heated to lift the balloon up. (The Density of air at 10.0°C is 1.25 kg/m?.)
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