how does hot air ballon rise up?
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Hot air balloons work on a simple principle - hot air rises while cold air sinks. This means the balloons fly because the hot air inside weighs less than the air on the outside - causing it to float upwards
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Hot air balloons work on a simple principle - hot air rises while cold air sinks. This means the balloons fly because the hot air inside weighs less than the air on the outside - causing it to float upwards.
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