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For most people (of normal density) the following is true: While in a pool, if you...

For most people (of normal density) the following is true: While in a pool, if you take a deep breath and hold it - you float. If you exhale all of the air out of your lungs - you sink. Explain why this is so.

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Answer #1

When you exhale, volume of your chest cavity decreases and due to the reduction in volume buoyancy force will also decrease and density of the body will increase.

As a result, the body sinks to get a new balance.

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