describe the construction and working of mercury barometer
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Answer:
The answer to the question-"describe the construction and working of mercury barometer" is-
Explanation:
Construction of Mercury barometer
In 1643, the general construction remain unchanged from the time of Torricelli's experiment . It was a three feet long glass tube, which is filled with mercury and closed on one end .It's open end is immersed in a cistern of mercury and the same end is inverted.
Working principle of mercury barometer
In a barometer, to prevent air from imbalancing or disturbing the scale and measures its one end is sealed .
Thus, we can say that a Mercury Barometer follows the principle of balancing the atmospheric pressure along with the volume of mercury which is present in the device.
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Answer:
The basic structure of a mercury barometer consists of a long tube of fixed length, a reservoir to store mercury, and the required amount of mercury. This setting is unchanged from Torricelli's experiments. It is called a glass manometer in which mercury is enclosed.
Complete step-by-step solution
A barometer is an estimating device used to measure atmospheric pressure. It is used especially for weather forecasting and altitude determination.
Construction mercury barometer:
A mercury barometer, also known as a Torricelli barometer, consists of an inverted long glass tube, 3 feet long, closed at one end and protruding at the open end into a glass vessel filled with mercury.
How a mercury barometer works:
When a glass tube is immersed in mercury, atmospheric pressure pushes against the surface of the mercury. This causes some of the mercury in the tube to rise up the tube. As the atmospheric pressure increases, the mercury inside the tube increases. You can read the atmospheric pressure from the mark on the glass tube. Lower atmospheric pressure means less mercury rises in the tube.
When drawing a mercury or Torricelli barometer, it is very important to mark the atmospheric pressure acting on the surface of the mercury and the vacuum existing inside the glass tube. The chemical symbol for mercury is Hg.
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