A swimmer cannot use a long hose to snorkel more than a meter deep because air
A) in the lungs cannot easily be expelled.
B) is buoyed up leaving the swimmer breathless.
C) tends to liquify in the snorkel tube.
D) at the surface will not freely enter the higher-pressure region in the compressed lungs.
E) all of these

Question

Quizplus · Accepted Answer

The correct answer is D because as a swimmer goes deeper, the pressure of the water increases. This increased pressure compresses the air in the lungs, making it harder to inhale air from the surface through a long hose. The pressure difference between the surface air and the higher-pressure environment in the lungs prevents air from freely entering the lungs, making it difficult to breathe.

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