AP Physics 2mediummcq1 pt
A hot air balloon rises because
A.heated air is less dense than the surrounding air
B.heated air becomes heavier
C.the burner pushes it up
D.air pressure is higher inside
Explanation
Core Concept
The balloon's average density drops below the air's, so buoyancy lifts it.
Correct Answer
Aheated air is less dense than the surrounding air
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