Question

3. Does hot air have a higher or lower density than the same mass of cool air? Why
Hence, explain why hot air balloons are able to rise up in the air.​

Answer 1

Explanation:

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The molecules in hot air are moving faster than the molecules in cold air. Because of this, the molecules in hot air tend to be further apart on average, giving hot air a lower density. That means, for the same volume of air, hot air has fewer molecules and so it weighs less

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Answer 2

Answer:

hot air has lower density

Explanation:

hot balloons raise up because hot air has a lower density than cold air this is also applies to conversion currents