68. During forced exhalation, such as when blowing up a balloon, the diaphragm and chest muscles create a pressure of 60.0 mm Hg between the lungs and chest wall. What force in newtons does this pressure create on the 600 cm^2 surface area of the diaphragm? (answer in N)

Question

Physics

Royce Gould

23 April, 17:12

68. During forced exhalation, such as when blowing up a balloon, the diaphragm and chest muscles create a pressure of 60.0 mm Hg between the lungs and chest wall. What force in newtons does this pressure create on the 600 cm^2 surface area of the diaphragm? (answer in N)

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Answers (1)

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Kevin Decker · Answer 1

F = 4798 N

Explanation:

The definition of pressure is the relationship between the force and the area over which it is applied.

P = F / A

Where P is the pressure, F the force and A area

The force is expressed in many common units between this mmhg, let's put this under pressure

P = ρ g h

P = 1.36 10⁴ 9.8 60 10³

P = 7996.8 Pa

Let's reduce the area to SI units

A = 600 cm² (1m / 100 cm) ² = 0.6 m²

We clear the initial equation

F = P A

F = 7996.8 0.600

F = 4798 N