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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.
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If to torricelli had drilled a little hole at the top of the glass tube holding his mercury column what would have happened to his barometer?
He would not have had a barometer. He would have had a glass tube stuck into a bowl of Mercury, with nothing in it. Because once the hole was made the vacuum would be gone and the mercury would fall back down to the bowl.It takes the vacuum in the tube to create a barometer.
If to r r i c e l li had drilled a little hole at the top of the glass tube holding his Mercury column what would have happened to his barometer?
If Torricelli had drilled a hole at the top of the glass tube holding his mercury column, air would enter the tube, causing the mercury to drop. This is because the atmospheric pressure, which supports the mercury column, would be equalized with the pressure inside the tube. As a result, the barometer would no longer function properly, as it relies on the vacuum at the top of the column to maintain the height of the mercury.
How do you measure the atmosphere pressure?
Atmospheric pressure is commonly measured using a barometer. A mercury barometer measures pressure by the height of a mercury column in a glass tube, while an aneroid barometer uses a flexible metal box to detect pressure changes. Both types of barometers provide a numerical value in units such as millibars or inches of mercury.
What device did Evangelista Torricelli invent to measure atmospheric pressure?
Evangelista Torricelli is known for his invention of the barometer in 1643. His original device consisted of a long tube of glass (which contained a vacuum) on top of a larger container of mercury. The pressure from air pressing down onto the exposed surface of the mercury would push the mercury upwards into the tube; thus, the higher the air pressure, the higher the mercury level. Air pressure was then measured using "millimeters of mercury", which corresponded to the mercury level within the tube.
Who invented the Mercury thermameter?
A mercury-in-glass thermometer, invented by German physicist Daniel Gabriel Fahrenheit, is a thermometer consisting of mercury in a glass tube. Calibrated marks on the tube allow the temperature to be read by the length of the mercury within the tube, which varies according to the heat given to it. To increase the sensitivity, there is usually a bulb of mercury at the end of the thermometer which contains most of the mercury; expansion and contraction of this volume of mercury is then amplified in the much narrower bore of the tube. The space above the mercury may be filled with nitrogen or it may be less than atmospheric pressure, which is normally known as a vacuum.
What accounts for the difference in heights of mercury vs water columns?
Density
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 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 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
How is a mercury barometer construct?
A mercury barometer consists of a tall glass tube filled with mercury inverted into a container of mercury. The mercury in the tube will fall until the weight of the mercury column is balanced by the atmospheric pressure pushing down on the surface of the mercury in the container. The measurement is then taken from the height of the mercury column in the tube.
What type of barometer was invented first the aneroid or the mercury?
The first barometer that was invented was the MERCURY barometer. a mercury barometer consists of a glass tube open at the bottom end and partially filled with mercury. (:
If Torricelli had drilled a little hole at the top of a glass tube holding his mercury column what would have happened to his barometer?
He would not have had a barometer. He would have had a glass tube stuck into a bowl of Mercury, with nothing in it. Because once the hole was made the vacuum would be gone and the mercury would fall back down to the bowl.It takes the vacuum in the tube to create a barometer.
Why must there be a near vacuum in the tube of mercury barometer?
A near vacuum is necessary in the tube of a mercury barometer to isolate the mercury from atmospheric pressure fluctuations. This allows the mercury to accurately reflect changes in pressure without external interference.
What did the first barometer look like?
The first barometer was a mercury barometer invented by Evangelista Torricelli in 1643. It consisted of a glass tube filled with mercury inverted in a dish of mercury. As atmospheric pressure changed, the mercury level in the tube would rise or fall, allowing for the measurement of air pressure.
What measures a barometer with Mercury?
A barometer that uses mercury measures air pressure by monitoring the height of the mercury column in a tube. As air pressure changes, the mercury level rises or lowers in response. This instrument is called a mercury barometer.
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.
Torricelli invented a device for measuring air pressure called a(n)?
Torricelli invented a device for measuring air pressure called a mercury barometer. It consists of a glass tube filled with mercury placed in a dish of mercury. The height of the mercury in the tube changes with variations in atmospheric pressure.
