Question

Hot air balloon float in air because of the low density​

Answer 1

Explanation:

In a hot air balloon due to the heating the air becomes lighter and start to go in upward direction .These helps the balloon to float in the air .density means the weight and as air is heated it becomes lighter means it it's density decreases.

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Answer 2

Explanation:

Hot-air balloons float because the air caught inside the balloon is heated up by a burner, making it less dense than the air outside. As the burner heats the air, it expands and some of the air escapes; that's what makes it less dense.