What is mercury barometer in detail?

A Mercury Barometer is a barometer with a glass tube that is closed on one end and open on the other side that is lowered in a mercury reservoir at the base. The higher the atmospheric pressure is, the more pressure it will put on the mercury reservoir, forcing the mercury to rise up in the column.

What is mercury barometer and their uses?

A mercury barometer is an instrument used to measure atmospheric pressure in a certain location and has a vertical glass tube closed at the top sitting in an open mercury-filled basin at the bottom. Mercury in the tube adjusts until the weight of it balances the atmospheric force exerted on the reservoir.

What is the principle of a mercury barometer?

Thus, in a barometer, one end is sealed to prevent air from disturbing the scale and measures. Therefore, a Mercury Barometer works on the principle of balancing the atmospheric pressure with the volume of mercury present in the device.

What are the 10 uses of mercury barometer?

Measurement of atmospheric pressure.

• Determining the altitude of a place.
• Weather Forecasting.
• Calibration and checking of aneroid barometers.
• Application in Fluid Mechanics.
• Measurement of pressure in aircrafts.
• Surface Weather Analysis.
• Preparation of Barographs.
• Why is mercury barometer important?

Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure. A barometer using water, for instance, would need to be 13.6 times taller than a mercury barometer to obtain the same pressure difference.

How do you read a mercury barometer?

There are two forms of mercury barometer; stick (you read the mercury height by looking directly at the top of the column inside the glass tube, and compare it to a scale of inches printed or engraved beside the column), and dial, also known as wheel or banjo (you read from a hand pointing to numbers on a dial.

Why mercury is a better barometric fluid than water?

mercury is a better barometric fluid than water because i. it needs no colouring ii. its density is many times greater than that of water iii. it does not wet glass iv.

Why is mercury used in a barometer rather than water?

Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure. A barometer using water, for instance, would need to be 13.6 times taller than a mercury barometer to obtain the same pressure difference.

Why is Mercury better than water in a barometer?

In barometer mercury is preferred over water because mercury has high density and low vapour pressure. mercury is shining and its level can be seen easily. What do we mean by atmospheric pressure what causes this pressure? Atmospheric Pressure is the force per unit area exerted on a surface due to the weight of air molecules above it.

What are the uses of a mercury barometer?

Barometer, device used to measure atmospheric pressure. Because atmospheric pressure changes with distance above or below sea level, a barometer can also be used to measure altitude. There are two main types of barometers: mercury and aneroid. mercury barometer Mercury barometer. Hannes Grobe

What describes a mercury barometer?

mercury barometer. noun. a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

What is mercury barometer in detail? A Mercury Barometer is a barometer with a glass tube that is closed on one end and open on the other side that is lowered in a mercury reservoir at the base. The higher the atmospheric pressure is, the more pressure it will put on the mercury reservoir, forcing…