Mercury barometers are also very delicate and fairly large, and generally need to stay in one place permanently. The instrument consists of a large glass tube with a closed top and open bottom, which sits inside a larger container.
Both the container and the tube are filled with mercury, and the tube may have measurement markings on the glass or along the sides. A mercury barometer works by equalizing pressure between the mercury in the large container and that within the tube. As atmospheric pressure rises, the weight of the air on the mercury of the container drives the mercury higher up the tube. When pressure falls, the air becomes lighter, and the mercury in the container exerts less force on that in the tube, allowing the level to fall.
This weather instrument works like a set of scales to forecast the weather. A classic mercury barometer is constructed from a 3-foot glass tube that is open at one end and sealed at the opposite end. The glass tube is filled with liquid mercury and rests upside-down in a reservoir of mercury.
As the mercury moves down the glass tube, a vacuum is created. Below, we have discussed the differences between the aneroid barometer and mercury barometer which are as follows My name is Mansi Shrivastava who happens to have a knack for writing. It has not always been what I admired but developing into a writer was something I appreciate the most now. When not glued to the computer screen, I love to try my hand in arts and crafts. Also, binge-watching with a bowl of snacks has always been my thing.
Computer Fundamentals. Uses of Computer at Home, Education. A-Z Shortcut keys of computer keyboard. Software testing interview questions. What does wi-fi stand for. Advantages and Disadvantages of Internet. Home Blog Quizzes About Us. In this write-up, we intend to discuss everything about the mercury barometer. For a better understanding of the topic, know the uses and advantages of a mercury barometer. Page Contents. Mansi Shrivastava.
Add Classmate4u to your Homescreen! Measures the pressure through the expansion and contraction of the metal box which makes the needle move on a pressure scale.
The vertical glass tube is about 3 feet high. It is fragile and bulky due to liquid mercury content. If you happen to be a weather geek, you get the added benefit of being able to share and crowdsource air pressure data with a bunch of other smartphone users via your phone's always-on internet connection and weather apps.
Barometric pressure can be reported in any one of the below units of measure:. When converting between them, use this formula: Edited by Tiffany Means. Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content. Create a personalised content profile.
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