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← ScienceWhich outcome occurs when a hot air balloon encounters localized atmospheric cooling?
A)Balloon descent accelerates; volume decreases✓
B)Lift increases surpassing structural limits
C)Envelope heats to compensate instability
D)Burner efficiency optimizes with lower temperatures
💡 Explanation
The balloon descends faster because thermal contraction reduces air volume inside, driving loss of buoyancy due to decreased air density. This process causes a phase transition; therefore, descent occurs rather than increased lift in stable warming conditions.
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