Question

The shape of a balloon is maintained by:

A

air pressure

B

Temperature

C

Wind velocity

D

Density of air.

Hard

Solution

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Correct option is
A

air pressure

When a balloon is inflated, the air inside exerts pressure on the inner surface of the balloon. But at the same time, the atmosphere exerts pressure on the outer walls of the balloon uniformly from outside. This gives the balloon its shape.

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