In atmospheres, what is the difference ?p between this internal air pressure and

Question

In atmospheres, what is the difference ?p between this internal air pressure and the water pressure against the body if the length of the snorkel tube is (a)25 cm (standard situation) and (b)3.6 m (probably lethal situation)? In the latter, the pressure difference causes blood vessels on the walls of the lungs to rupture, releasing blood into the lungs. An elephant can safely snorkel through its trunk while swimming with its lungs 3.6 m below the water surface because the membrane around its lungs contains connective tissue that holds and protects the blood vessels, preventing rupturing.

Explanation / Answer

?P = ?gd where ? = density of water in kg/m³ and d is the depth in meters. The units of ?P are N/m²

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