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That depends on the 'tube' involved.
In a thermometer the Mercury expands and contracts within a sealed tube as the temperature is raised or lowered.
In a barometer there is a reservoir of mercury which the atmosphere presses on. This maintains the mercury in a column which is sealed at the top. Increases in atmospheric pressure push the mercury further up the tube, decreases let it drop down the tube.
What else can I help you with?
How a Mercury barometer functions?
A Mercury barometer functions by measuring atmospheric pressure using a column of mercury in a glass tube. The tube is inverted into a reservoir of mercury, and as atmospheric pressure changes, it either pushes the mercury up or allows it to fall within the tube. The height of the mercury column, typically measured in millimeters or inches, corresponds to the atmospheric pressure, with higher columns indicating greater pressure. This device effectively translates pressure variations into measurable height differences of the mercury.
How the two types of barometer measure atmospheric pressure?
Barometers measure atmospheric pressure using two main types: mercury and aneroid. A mercury barometer consists of a glass tube filled with mercury, where the height of the mercury column changes in response to atmospheric pressure; higher pressure pushes the mercury up the tube. An aneroid barometer, on the other hand, uses a sealed metal chamber that expands or contracts with pressure changes, moving a needle on a dial to indicate the current atmospheric pressure. Both types effectively provide a measurement of pressure, though they operate on different principles.
How does a barometer work?
There are a couple of types. By far the most common is the aneroid barometer. The heart of an aneroid barometer is a sealed can. As the surrounding pressure rises and falls, the can shrinks and expands. A mechanical linkage translates the deflection into the movement of a dial. It could also be measured with a strain gauge, with the resistance translated into pressure.The Mercury barometer has a tube sealed at the top, full of mercury sitting in a cup full of mercury. A vacuum forms at the top because the exterior pressure can only support a column equal to the height times the density of mercury.Air pressure pushes on the mercury inside of the container, the mercury moves up the glass tube. The greater the air pressure the higher the mercury will rise.
Does the chamber of a barometer expand or contract as the air pressure goes up?
The chamber of a barometer will contract as air pressure goes up. A rise in air pressure pushes the mercury column downward, causing the chamber at the top to become smaller.
Who discovered atmospheric pressure?
Evangelista Torricelli discovered atmospheric pressure. Secretly, he created an expierement with some of his friends. By filling a bowl with mercury and placing a six foot long glass tube upside down into it, a vacuum was created, causing the mercury to rise up. This was an early barometer. The reason this expierement was kept secret was probably because in 1643, this would have been considered witchcraft because a vacuum was considered impossible.
What pushes mercury up a tube in a mercury barometer?
the air off of Mercury has a big tube in the inside of it and it pushes in up
When air pressure goes up the liquid in a mercury barometer goes?
When air pressure goes up, the liquid in a mercury barometer goes down. This is because as air pressure increases, it pushes the mercury in the tube to rise, indicating higher pressure.
Why doesn't Mercury boil in the vacuum tube of a barometer?
there must be vacuum in the Mercury barometer because if air enters the tube the barmeter would become faulty as air pressure will change.
How does high pressure area effect a mercury barometer?
Higher air pressure forces the mercury farther up the tube.
How the two types of barometer measure atmospheric pressure?
Barometers measure atmospheric pressure using two main types: mercury and aneroid. A mercury barometer consists of a glass tube filled with mercury, where the height of the mercury column changes in response to atmospheric pressure; higher pressure pushes the mercury up the tube. An aneroid barometer, on the other hand, uses a sealed metal chamber that expands or contracts with pressure changes, moving a needle on a dial to indicate the current atmospheric pressure. Both types effectively provide a measurement of pressure, though they operate on different principles.
Structure of barometer?
A barometer typically consists of a glass tube filled with mercury or a liquid metal, sealed at one end and open at the other. The open end is placed in a container of mercury, allowing atmospheric pressure to push the mercury up the tube. The height of the mercury column is a measure of the atmospheric pressure.
How does a barometer work?
There are a couple of types. By far the most common is the aneroid barometer. The heart of an aneroid barometer is a sealed can. As the surrounding pressure rises and falls, the can shrinks and expands. A mechanical linkage translates the deflection into the movement of a dial. It could also be measured with a strain gauge, with the resistance translated into pressure.The Mercury barometer has a tube sealed at the top, full of mercury sitting in a cup full of mercury. A vacuum forms at the top because the exterior pressure can only support a column equal to the height times the density of mercury.Air pressure pushes on the mercury inside of the container, the mercury moves up the glass tube. The greater the air pressure the higher the mercury will rise.
If a meterologist says that air pressure is getting lower what would you expect to see happen to torriclli's mercury barometer?
If air pressure is getting lower, you would expect to see the mercury in Torricelli's barometer rise. This is because low air pressure allows the mercury in the barometer tube to be pushed up by the weight of the atmosphere.
Why doesn't mercury boil in the vacuum of a barometer?
Becuase the presure just pushes it up and down so it couldn't boil because it would always be moving
Does the chamber of a barometer expand or contract as the air pressure goes up?
The chamber of a barometer will contract as air pressure goes up. A rise in air pressure pushes the mercury column downward, causing the chamber at the top to become smaller.
If a mercury barometer were carried up a mountain how would you expect the height of mercury column to change?
As a mercury barometer is taken up a mountain, the height of the mercury column would decrease. This occurs because atmospheric pressure decreases with altitude, leading to less force exerted on the mercury in the barometer. Consequently, the lower atmospheric pressure results in a shorter column of mercury being supported.
How can you prove that atmosphere exerts pressure?
The original experiment that demonstrated this was a portable Mercury column.If you have a large bowl full of Mercury (a liquid metal) and a 1 meter long glass tube open at one end, then you can make a simple barometer. First, completely fill the tube with mercury, and temporarily close of the open end of the glass tube with a fitted seal, so the glass tube will be completely full of mercury and closed at both ends. Then stand the inverted tube (with its sealed end in the bowl of mercury), and while the end of the tube is immersed in the mercury, remove the fitted seal, allowing the mercury trapped inside the tube to flow into the bowl. Some of the mercury will flow out of the tube into the bowl, but the air pressure will cause the remaining mercury remain in the tube up to a height of (about) 760 mm above the mercury level in the bowl. The volume in the tube above the column of mercury will be filled with a vacuum..If you were to then take your portable barometer on a hike up a mountain, you would notice that the volume of the vacuum in the tube would become greater, and the column of mercury in the tube become shorter. This is because the atmospheric pressure keeping the mercury up the tube is lower at a higher altitude..Note: Mercury is a dangerous substance and must be handled with care. The above experiment should not be attempted except under the supervision of qualified laboratory personnel..See the related link below.
