Question

define a mercury barometer

Answer 1

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, height of the column, the height of the column varying with atmospheric pressure.

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Answer 2

Answer:

A mercury barometer comprises of a glass tube inset into a dish of mercury and colored denatured alcohol.

Explanation:

Mercury Barometer:

Mercury barometer is the simple barometer which uses the mercury to measure the atmospheric pressure.

Measures the outer pressure by calculating the height of mercury inside the vertical glass tube.

Large and fragile and hard to handle during transportation.

It is hard to measure because the height should be calculated precisely only after it gets balanced.

It does not need any machinery for the construction.

It is used in weather forecasting and laboratories etc.