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A balloon filled with helium or hot air ...

A balloon filled with helium or hot air can float in the atmosphere. A balloon filled with air from your lungs falls to the ground when it is released. Why do these balloons behave differently?

Text Solution

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Air and gases, like water are, fluids. Both balloons are in a fluid yet behave differently because of density. The balloon filled with helium or hot air is less dense than the air in the atmosphere. An object that is less dense than the fluid will float. The balloon filled with air s from the lungs falls to the ground slowly because it is denser than the air.
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