Long Snorkel: Inhalation of a breath occurs when the muscles surrounding the hum

Question

Long Snorkel: Inhalation of a breath occurs when the muscles surrounding the human lungs move to increase the volume of the lungs, thereby reducing the air pressure in the lungs. The difference between the reduced pressure in the lungs and outside atmospheric pressure causes a flow of air into the lungs. The maximum reduction in air pressure that muscles of the chest can produce in the lungs against the surrounding air pressure on the chest and body is about 3910 Pa. Consider the longest snorkel that a human can operate. The minimum pressure difference needed to take in a breath is about 278 Pa. Find the depth h that a person could swim to and still breathe with this snorkel._______________

Explanation / Answer

The maximum pressure difference up to which a swimmer can manage is 3910pa

This pressure should be equal to hdg of water.

P=hdg

3910 =hx1000x9.8

The depth of water h= 3910/9800=0.40m up to which a person can snorkel.

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