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What happens to the height of the mercury column if the atmospheric pressure is increased?

There is a direct relation between the air pressure and height of mercury column. If atmospheric pressure increases, the height of mercury column will also increase.

Why does the height of the mercury column change from day to day?

Torricelli predicted that the height of the mercury column would change from day to day as the pressure of the atmosphere changed. … Repeated experiments showed that the average pressure of the atmosphere at sea level is equal to the pressure of a column of mercury 760 mm tall.

What is the height of a column of mercury?

approximately 30 inches
At sea level and at a temperature of 0° Celsius (C), the height of the mercury column is approximately 30 inches, or 76 centimeters. This represents a pressure of approximately 14.7 psia. The 30-inch column is used as a reference standard.

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.

How will the height of the mercury column change when the atmospheric pressure decreases?

At sea level, a mercury column will rise a distance of 760 mm. This atmospheric pressure is reported as 760 mmHg (millimeters of mercury). At higher altitudes, the atmospheric pressure is decreased and so the column of mercury will not rise as high. … Atmospheric pressure is slightly dependent on weather conditions.

What will happen to the height of the mercury column if we take a barometer inside a deep pit trench?

Below the earth’s surface, as we go deeper, the pressure increases. As the pressure outside the barometer increases, it starts pushing the mercury which inturn results in increase in the level of mercury column.

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 when mercury barometer is tilted?

height of mercury column remains same. When a mercury barometer is tilted, then the vertical height remains constant but length of mercury column increases. …

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.

How is barometric height altered when a drop of water is introduced in a mercury barometer?

the barometer height will decrease if a drop of water is introduced in a mercury barometer, which is due to the pressure exerted by water vapour.

How barometric height is affected?

High atmospheric pressure places more force on the reservoir, forcing mercury higher in the column. Low pressure allows the mercury to drop to a lower level in the column by lowering the force placed on the reservoir.

How will the barometric height change if shape of the tube is changed?

Barometric height is only changed when atmospheric pressure changes. It remains the same even when the shape, length or angle of the barometer tube is changed.

What happens to the climate when the barometric height gradually falls?

The atmospheric pressure or the barometric height decreases as the temperature or the presence of moisture increases. If the barometric height gradually falls it indicates that the moisture is increasing and there is a possibility of rain.

What does barometric height mean?

n. 1 an instrument for measuring atmospheric pressure, usually to determine altitude or weather changes. 2 anything that shows change or impending change.

Why is the barometric height used as a unit to express the atmospheric pressure?

Barometric height used as a unit to express the atmospheric pressure because atmospheric pressure holds the mercury in the tube, so the height of mercury is used as a unit to express the atmospheric pressure.

What change in barometric height is observed when there is dry weather at a particular place?

A gradual increase in the barometric height indicates a dry weather. A sudden rise in barometric height indicates an extremely dry weather.

What can be predicted about the weather if the barometric height rises suddenly?

3) If the barometric height increases gradually, it indicates the advent of dry weather. 4) If the barometric height suddenly increases, this indicates flow of air from that place to surrounding area which will mean coming of extremely dry weather.

How does the presence of moisture in air affect barometric height?

When atmospheric pressure rises, the mercury column in a barometer rises and when atmospheric pressure falls, the height of mercury in the barometer falls. If there is moisture present in mercury, its density and vapor pressure will increase and so the barometric height increases.

How does a mercury barometer work?

The barometer works by balancing the weight of mercury in the glass tube against the atmospheric pressure, much like a set of scales. … If the weight of mercury is less than the atmospheric pressure, the mercury level in the glass tube rises (high pressure).

What do changes in barometric pressure suggest about the weather?

Changes in atmospheric pressure often, but not always, predict the weather in coming days. Falling pressure suggests that a low-pressure zone with wet, stormy weather is moving your way. Rising barometric pressure is often, though not always, a sign that the weather will soon clear and turn fair and sunny.

What do the following indicate in a barometer regarding weather no abrupt change in barometric height?

It signifies that the atmospheric pressure at the region has become low. If the relative humidity in the atmosphere is high, there there is a possibility of rain in that area.

How does inches of mercury work?

Inch of mercury (inHg and ″Hg) is a unit of measurement for pressure. … In older literature, an “inch of mercury” is based on the height of a column of mercury at 60 °F (15.6 °C). 1 inHg60 °F = 3,376.85 pascals (33.7685 hPa) In Imperial units: 1 inHg60 °F = 0.489 771 psi, or 2.041 771 inHg60 °F = 1 psi.

What is mercury barometer in geography?

mercury barometer

Noun. tool that determines atmospheric pressure by measuring how much mercury moves in a glass tube.

What do the following indicate in a barometer regarding weather 2m I sudden fall in mercury level II gradual rise in mercury level?

Gradual rise in mercury level is equal to good weather conditions or sunny days. Thus, no possibility of rain.