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181 - EASA BPL Hot-Air Balloon Theory in English - For a hot-air balloon at the same ambient pressure, envelope volume and internal air temperature, what happens to its lifting capacity when the outside air temperature decreases?

Question 181 - Flight Performance and Planning - BPL Hot-Air Balloon Pilot Licence

The lifting capacity decreases because the surrounding air becomes less dense
The lifting capacity increases because the surrounding air becomes denser
The lifting capacity remains unchanged because ambient temperature has no effect
The lifting capacity decreases because the heated air inside becomes heavier despite its unchanged temperature

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