as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
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how does a hot-air balloon fly?
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a hot-air balloon flies when the air inside the balloon is heated by a burner. the hot air is less dense than the cold air outside of the balloon, so the balloon rises and floats. as the air inside the balloon cools, the hot-air balloon descends.
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