explain-how-the-mercury-level-in-a-barometer-changes-when-a-high-pressure-system-moves-into-a-regi-2

Name: explain how the mercury level in a barometer changes when a high pressure system moves into a regi 2
Uploaded: 2020-10-14
Duration: 1 min 23 s
Channel: Numerade
Description: Explain how the mercury level in a barometer changes when a high-pressure system moves into a region.

Question

Explain how the mercury level in a barometer changes when a high-pressure system moves into a region.

David Collins · Accepted Answer

question Number seven asks us to describe the functionality of a barometer and why the level of the mercury in the barometer is going to change when we have a high pressure system that moves in. So here we have a barometer has mercury open to the atmosphere so that it can feel the pressure. The external pressure appear. We have a vacuum. So as we increase the external pressure, then that is going to push mawr on the Mercury. The mercury has nowhere to go but up inside of the barometer. And so as Ah, high pressure system moves in and pushes down with greater force, we&#x27;re going to see a rise in the mercury so that this pressure, the pressure associated with the height of the mercury in the column, equals atmospheric pressure. Or we could say P mercury, due to its height, equals P atmosphere.

Matthew Potter · Answer

and this problem were asked, How does a barometer work? Well, a Mercury barometer, I should say What we have here is we&#x27;re going to have a basin where it&#x27;s filled to some degree with mercury, which is toxic but by all means play around with it. But one reason the searches, because it is a metal that is a liquid. What happens is the pressure from the atmosphere will push down on the mercury. And because we have a test tube in here that essentially creates a vacuum, the atmosphere will actually push the mercury up to a certain point within the tube. More atmospheric pressure there is, the higher this goes. Neema up here is just a vacuum. So essentially they will always keep something in here. What as long it is, it is under the pressure from the atmosphere. Ah, mercury in thermometers are generally made so that they won&#x27;t reach the top under normal circumstances. So as the atmosphere will push down on, the Marikina will go up the test tube. I&#x27;ll tell us about pressure will say that here is atmospheric pressure at sea level. Now. This problem asked whether it would be higher or lower if you went up to a mountain. So as you rise in elevation, what happens is that atmospheric pressure drops One way you could think of this if this is our atmosphere and this is an uneven earth, So down here you have all of this atmosphere pushing down on you at the top of the mountain. You&#x27;re gonna have a little less atmosphere and that will to make a difference and pressure. So there&#x27;s going to be a little less pressure if you go up. So because of that, this will actually drop. So what we would see is that by comparison, I will say this would be mountain level. I&#x27;m just gonna write mountain here. So this has to do with the fact that, like I said, there&#x27;s going to be a little less pressure because the atmosphere isn&#x27;t quite as hi at this point. Hopefully that helps you all out. This problem

Sherry Tsui · Answer

a Mercury barometer is used to measure atmospheric pressure. What I&#x27;ve roughly drawn here is an example of a mercury barometer, a glass tube with a vacuum. We&#x27;ll stand in a Mercury reservoir when the air pressure exerts force on the surface of the mercury, some of it will rise in the glass tube, and the atmospheric pressure is equivalent to the weight of mercury in the glass tube.

Anna Mcgriff · Answer

So today we&#x27;re gonna be talking about just a simple mercury barometer and how we can use that to measure pressure. So what we do is we take our nice tube filled with mercury, and we flip it upside down into a nice dish that&#x27;s also filled with mercury. And what we expect to happen if we don&#x27;t consider pressure is the mercury in the tube will fall out. In addition, everything will kind of equal every but this doesn&#x27;t happen. Instead, some amount of the mercury states raised above in the to, um above where the mercury is in the dish. And so we get something that looks like this over here on. And so why is that? Why do we have this Mercury state up? Why isn&#x27;t it falling down by gravity? And so the answer, of course, is pressure. We have all of these gases all around us in the atmosphere, and they&#x27;re all being pulled down towards the Earth by gravity as well. And so they pushed down on the mercury in this dish. And so what we have here is that the gravity that&#x27;s pulling on the mercury and our tube here when it stops Nicola berates is equal to the amount of force that we have that are. Air is pushing down onto our and here under the mercury in our dish. And so this allows us to measure pressure and inches of mercury above the Stich. You know, these here are inches of mercury and so at sea level. On a normal day, we expect that averages about 760 millimeters.

A. Elizabeth Hildreth · Answer

problem. See, three says that the barometer below the one on the left here shows the level of mercury and given atmospheric pressure, this problem instructs you to fill all the other barometers with mercury for that same atmospheric pressure and explain why you&#x27;ve chosen to fill them to such a level. So, um, I&#x27;ll go ahead and fill each of these parameters with the amount that should be in them. Well, that&#x27;ll explain why I have chosen this amount. So as he can see, I&#x27;m filling each of thes barometers to the same height of mercury as the 1st 1 Now, the reason that this is is because the atmospheric pressure pushing down on the liquid and container that each of these barometers, this end is a constant and exerts a certain well, pressure on this liquid such that no matter what, the shape or size of each of these barometers wth e liquid will actually rise to the same height. Okay, um, so if you look, you know, if you look somewhere as simple is like Google images or something like that, you&#x27;ll see that barometers come in all different shapes and sizes. And you might wonder, you know how they how they work, how they read out the same, um, pressure. If if they&#x27;ll look very different. And, um, it&#x27;s just a simple is this Ah, depending on what the atmospheric pressure is. Say, you know, it&#x27;s the standard one atmosphere or 760 tour, which is the same thing as, you know, 760 millimeters of mercury. Um, this particular number here could be completely useless if, um, standard atmospheric pressure this this millimeters height and mercury depended on what? The tube? Um, what the barometer looked like. And so by this property that whatever pressure on the atmosphere exerts on the liquid that&#x27;s supposed to rise into the barometer, um, exerts pressure evenly across this, um, this pool and pushes liquid up into the barometer to a certain height, independent of what? The shape or the size of the barometer actually is

Kevin Zaborsky · Answer

The purpose of this conceptual question is to understand how Torricelli&#x27;s barometer measures atmospheric pressure. This is a general diagram of what the barometer looks like. There is an inverted tube containing mercury at a certain height, and all the void space above that height is a vacuum, and gravity pushes down on that column of mercury. And an opposing force of atmospheric pressure pushes down on the open portion of the mercury pool and forces that mercury to increase its height and in the inverted tube. And when those that opposes the force of downward gravity on the mercury than the height of the mercury increases And when that&#x27;s the case, there is an increase in atmospheric pressure. And so, therefore, this is how this device works, where the level of mercury and that inverted tube directly corresponds to the amount of atmosphere pressure pushing down on the on the portion of the mercury pool that is open to the atmosphere

Problem

Explain why the liquid in the barometer does not …

Problem 7 Easy Difficulty

Explain how the mercury level in a barometer changes when a high-pressure system moves into a region.

Answer

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