Does the width of a barometer matter?

When atmospheric pressure is measured by a barometer, the pressure is also referred to as the “barometric pressure”. The physical dimensions (length of tube and cross-sectional area of the tube) of the barometer itself have no effect on the height of the fluid column in the tube.

What happens to barometric height of the glass tube is pushed further down into trough of mercury?

If the tube of a simple barometer is pushed down into the trough of mercury then the atmospheric force exerted on the tank will be adjusted by the mercury until the weight of the mercury column gets balanced. Hence the barometric height of a simple barometer remains unaffected.

What happens to the mercury in the barometer tube when the pressure increases?

When air pressure increases, the mercury in the tube rises. When air pressure decreases, so does the height of the mercury column.

What is the effect on the vertical height of the mercury column in a barometer when taken on top of a mountain?

It will just make it harder to read. Like tilting a bottle of soda, the mercury will tilt in the tube so that the reading on the side closest to the earth will be higher and the side away would be lower. In (D) at the top of a mountain the air pressure is much lower so the vertical height will be lower.

Why is mercury used in barometer?

Barometer is used to determine the local atmospheric pressure. Mercury is employed in the barometer because its density is sufficiently high for a relative short column to be obtained. and also because it has very small vapour pressure at normal temperature.

Why is mercury used as a barometric liquid?

Mercury is employed in the barometer because its density is sufficiently high for a relative short column to be obtained. and also because it has very small vapour pressure at normal temperature. High density scales down the pressure head(h) to repesent same magnitude of pressure in a tube of smaller height.

What are the two factors which affect the atmospheric pressure as we go up?

* Temperature. Altitude : air pressure decreases with an increase in altitude. Temperature : air pressure increases with an increase in temperature.

What happens to mercury in a barometer?

Mercury in barometric measurement is equivalent to the column of mercury in the barometer with the atmospheric pressure. Hence,as pressure increases it is obvious for increase of the mercury column as the column of mercury has the pressure dependency on its length above horizon.

What is the normal height of mercury in a simple barometer?

A mercury barometer. A pressure of 1 atm will support a column of mercury 76 cm high. That is, a pressure of 1 atm will support a column of mercury 76.0 cm high. Deviations of the height of the column from the normal value of 76.0 cm reflect changes in the atmospheric pressure due to local weather conditions.

What are the limitations of the mercury barometer?

what are the limitations of the mercury barometers?

• Disadvantage of a mercury barometer:
• A major disadvantage of the mercury barometer is its bulk shape and fragile glass tube.
• The mercury levels may be difficult to read under unsteady conditions, as on board a ship at sea.