In a mercury barometer what pushes the mercury up in a tube?

Answer 1

Pressure pushes the mercury. As the air pressure rises, the mercury will compress the air inside the cylinder to match the outside air pressure, and will rise.

Answer 2

A barometer is a extensively used climate tool that measures atmospheric tension (additionally everyday as air tension or barometric tension) - the burden of the air interior the ambience. There are 2 significant varieties of barometers – the main extensively obtainable and robust Mercury Barometers, or the extra moderen digital friendly Aneroid Barometer. The classic mercury barometer is regularly a tumbler tube approximately 3 ft extreme with one end open and the different end sealed. The tube is packed with mercury. This glass tube sits the different way up in a field, called the reservoir, which additionally is composed of mercury. The mercury point interior the glass tube falls, becoming a vacuum on the precise. the 1st barometer of this kind replaced into devised via Evangelista Torricelli in 1643. The barometer works via balancing the burden of mercury interior the glass tube against the atmospheric tension merely like a series of scales. If the burden of mercury is under the atmospheric tension, the mercury point interior the glass tube rises. If the burden of mercury is extra beneficial than the atmospheric tension, the mercury point falls.

Answer 3

To properly set up a mercury barometer, one fills the barometer tube completely with mercury, blocks the open end, and then inverts it into a container of mercury, making sure no air gets inside the tube when it is unblocked. As a result, you have a tube of mercury with a gap at the closed end. That gap is a vacuum. It's pulling up on the mercury but the weight of the mercury is pulling it down out of the tube.

Why doesn't it run completely out of the tube? Because it has to displace the mercury underneath it, pushing it up toward the rim of the container. But it can't do that because there is a column of air 60 miles tall resting on top of that mercury, and that column of air weighs exactly as much as the mercury hanging in the tube. If the air weighed less, more mercury could run out of the tube. If it weighed more, the mercury would back up into the tube more.

We call that air weight "pressure", and the height that it can push mercury up into an evacuated tube is one of its units of measure. "30.1 in/hg" (1020 mm/Hg) literally means the column of mercury (Hg) inside the tube is 30.1 inches (or 1020 mm) tall. (You could actually do the same thing with water, but that tube would have to be about 10 METERS tall.)

Answer 4

In a barometer which is of mercury type,the weight of the column of mercury is made to balance the pressure of the atmosphere over a mercury trough.When the pressure becomes more, the length of the mercury column also shoud become more to balance it.This is achieved by using the pressure itself forcing some more mercury from the mercury-trough to rise up, making the length of the column more. So it the air pressure that pushes the mercury up.

Answer 5

Air Pressure

Answer 6

Magic!! Air Pressure

Answer 7

Air pressure

Answer 8

hi there ;
the air pressure that is pushing down / called atmospheric pressure / this is 14.696 lbs / sq in at sea level / there must be a vacuum at the top of the top in order to work /

Answer 9

THE MERCURY ESPANDS DUE TO TEMPERATURE INCREASES CAUSING THE METAL TO RISE INSIDE THE GLASS

Answer 10

air pressure