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RideAnS [48]
3 years ago
12

Which of the following creates an adhesive force that prevents separation of the parietal and visceral pleurae during ventilatio

n?
negative intrapulmonary pressure
negative intrapleural pressure
alveolar fluid surface tension
lung elasticity
Physics
1 answer:
Diano4ka-milaya [45]3 years ago
3 0

Answer:

Negative intrapleural pressure is the correct answer

Explanation:

Intrapleural pressure is more subatmospheric in the uppermost part of the thorax than in the lowermost parts in the standing horse.

Air moves from a region of higher pressure to one of lower pressure.  Therefore, for air to be moved into or out of the lungs, a pressure difference between the atmosphere and the alveoli must be established. If there is no pressure difference, no airflow will occur.

Under normal circumstances, inspiration is accomplished by causing alveolar pressure to fall below atmospheric pressure. When the mechanics of breathing are being discussed, atmospheric pressure is conventionally referred to as 0 cm H2O, so lowering alveolar pressure below atmospheric pressure is known as negative-pressure breathing.

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The work done by the force is 47.1 J

Explanation:

The work done by a force in moving an object is given by

W=Fd cos \theta (1)

where

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\theta is the angle between the direction of the force and the motion of the object

In this problem, the force applied to the object is

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This force is always tangential to the track: this means that at every instant, the force is parallel to the motion of the object, so

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And the distance covered is equal to the circumference of the circle, which is:

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Now we can substitute into eq.(1) to find the work done:

W=(3.0)(15.7)(cos 0)=47.1 J

Learn more about work:

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