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What accounts for the difference in heights of mercury vs water columns?
Density
What is the space above the mercury in the tube of a mercury barometer?
The space above the mercury in the tube of a mercury barometer is a vacuum, meaning it is devoid of air or any other gases. This vacuum allows for accurate measurement of atmospheric pressure, as the height of the mercury column is influenced solely by external air pressure acting on the surface of the mercury in the reservoir. Changes in atmospheric pressure will cause the mercury to rise or fall in the tube, providing a reliable indication of current pressure levels.
What supports the column of mercury inside the glass tube of a barometer?
Another tube. Or in a solid manomometerof any type, a hollowed out, encapsulated space.
What occupies the space above the mercury column in the barmoter's glass tube?
In a barometer, the space above the mercury column is typically a vacuum. This allows the mercury column to accurately reflect changes in atmospheric pressure without any interference from air molecules or other gases.
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
If a smell - diameter open glass tube is partially immersed in a vessel containing mercury the surface of the mercury inside the tube will be?
convex
What is inside the glass tube from a thermometer?
either mercury or alcohol
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.
What process the mercury vapour produces light Inside a fluorescent tube?
When electricity passes through the tube, it excites the mercury vapour inside, causing it to emit ultraviolet (UV) light. The UV light then interacts with phosphor coating on the inside of the tube, causing it to fluoresce and produce visible light.
How mercury rises in thermometer by rising temp?
The mercury in the thermometer's tube expands and contracts due to the surrounding temperature. As the mercury is inside a narrow tube, it can only expand upwards, and contract downwards.
How did people measure the temperature in 1960?
They had thermometers that were a glass tube with mercury sealed inside. There were temperature markings on the outside of the tube that when the mercury reached that point it showed what the temperature was.
What pushes Mercury up in a tube of a Mercury barometer?
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.
