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The aqueous humor in a person's eye is exerting a force of 0.300 N on the 1.10 -cm $^{2}$ area of the cornea. (a) What pressure is this in mm Hg? (b) Is this value within the normal range for pressures in the eye?

(a) $P_{\mathrm{AH}}=20.5 \mathrm{mm} \mathrm{Hg}$(b) Yes.

Physics 101 Mechanics

Chapter 11

Fluid Statics

Fluid Mechanics

Marsh D.

November 10, 2020

Cornell University

University of Washington

Simon Fraser University

University of Sheffield

Lectures

03:45

In physics, a fluid is a substance that continually deforms (flows) under an applied shear stress. Fluids are a subset of the phases of matter and include liquids, gases, plasmas and, to some extent, plastic solids.

09:49

A fluid is a substance that continually deforms (flows) under an applied shear stress. Fluids are a subset of the phases of matter and include liquids, gases and plasmas. Fluids display properties such as flow, pressure, and tension, which can be described with a fluid model. For example, liquids form a surface which exerts a force on other objects in contact with it, and is the basis for the forces of capillarity and cohesion. Fluids are a continuum (or "continuous" in some sense) which means that they cannot be strictly separated into separate pieces. However, there are theoretical limits to the divisibility of fluids. Fluids are in contrast to solids, which are able to sustain a shear stress with no tendency to continue deforming.

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The aqueous humor in a per…

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Problem The aqueous humor …

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(a) What is the absolute p…

essentially for part A. We know that the definition of pressure is a force over a unit area, and so this would be equaling 0.300 Newton's divided by, ah, 110 when ah, way sorry, 1.10 cubic centimeters is equally 1.10 times 10 to the negative forth square meters where, of course, one square centimeter is equaling 10 to the negative forth square meter. So century. That's how we would convert. And the pressure is that equaling 2.73 times 10 to the third Pascal's we're gonna convert this and we're going to say that for every one millimeter of mercury there are 133 0.3 Pascal's. And so this is equally 20 point. We can say 20.5 millimeters of mercury. And the, uh this would be our answer for part A. For part B. Is it reasonable? Well, the accepted range would be 12 millimetres of mercury and 24 millimeters of mercury, and so in the eye, 20.5 millimeters of mercury does fall within this range. So yes, any result in part, a is reasonable. That is the end of the solution. Thank you for one

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