why is balloon filled with air
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Explanation:
A gas balloon is a balloon that rises and floats in the air because it is filled with a gas lighter than air (such as helium or hydrogen). When not in flight, it is tethered to prevent it from flying away and is sealed at the bottom to prevent the escape of gas
Answered by
1
Answer:
Balloon has the property of elasticity.
When it is filled with air its surface area increases
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