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To inhale, we contract our diaphragm and intercostal muscles thus expanding the chest cavity and lowering the internal air pressure below normal so that air flows in through the mouth and the nose to the lungs. Suppose a person’s lungs hold about 1300 mL of air at 1 atm. If she expands the chest cavity by 550 mL while keeping the nose and the mouth closed, what would be the air pressure in the lungs in atm? Assume the air temperature remains constant.

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Answer 1

Answer #1

Initial volume V₁ = 1300 mL,

final volume V₂ = 1300 + 550 = 1850 mL Initial fmal volume V, 1300 mL volume k-C30D+550)mL So

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Answer 2

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