does hot air have a higher density or a lower density than the same mass of cool air? Why? Hence, explain why hot air balloons are able to rise up in the air
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Hot air pushes out on the air around it, and thus becomes less dense. Less dense air rises because the denser, cooler air sinks because it is heavier and gravity pulls on it more strongly
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Hot air pushes out on the air around it, and thus becomes less dense. Less dense air rises because the denser, cooler air sinks because it is heavier and gravity pulls on it more strongly
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