00:01
Problem 43 says that a sealed tube monometer as shown below or here, excuse the rough drawing, can be used to measure pressures below atmospheric pressure.
00:12
So the way that you do this is by, you know, prior to adding a gas to your flask here, the levels in this u shape here are the same.
00:23
But once you add a gas at lower pressure than atmosphere, you see movement.
00:30
Of the liquid inside of the monometer and a change or a difference in height between these two parts of this u -bend.
00:39
So the problem gives that this height is equal to 6 .5 centimeters.
00:45
So what we can do to solve this problem then is this solution here is mercury, so we can convert centimeters to millimeters, which is sort of a standard measurement for pressure by knowing that 10 millimeters, is equal to one centimeter, giving us 65 millimeters of mercury.
01:11
And then because this problem is asking us for pressure in tor, pascal's, and atmospheres, we can then convert based on what we know of these conversions.
01:23
So one millimeter of mercury is equal to one tor, which means that the pressure in this flask here is 65 tor...