00:03
In this problem, we're asked about the force increase in someone's eye if they have glaucoma.
00:09
And as a starting point, the values that we're given are in millimeters of mercury for the pressure, and we want to convert that to newton's per meter squared, the si unit, so that we can express the force in newton's.
00:23
So first off, we need to look up the conversion factor between millimeters of mercury and newton's per meter squared.
00:33
And it turns out that there's 133 .3 newtons per meter squared for each millimeter rise in mercury.
00:42
And we're told that the pressure in a normal eye is about 24 millimeters mercury, and in an eye with glaucoma, it can go up to 50.
00:54
So what we're interested in here is the change in pressure, so that's given by 50 minus 24.
01:00
And then because we want to express this in newton's per meter squared or pascal's, we need to multiply by this conversion factor of 133 .3.
01:14
So lastly, if we want to know what the force associated with this change in pressure is, we need to multiply by the area of the eye.
01:31
So the change in force will be equal to the change in pressure times ai...