Atm
air pressure is decreasing
It is approx 46.3 feet.
Pressure decreases as height increases and vice-versa.
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Formulas for atmospheric pressure variation with altitude. Scroll down to related links and look at "Atmospheric pressure - Wikipedia".
Yes, as air pressure increases, the height of the column of mercury in a barometer also increases. This is because the higher air pressure pushes down on the mercury in the barometer, causing the column to rise. Conversely, lower air pressure will cause the column of mercury to fall.
air pressure is decreasing
When the air pressure is getting lower, the column of mercury in the barometer will fall as well. This indicates that the atmospheric pressure is decreasing.
low pressure system and stormy weather
The height of the mercury column in a barometer is determined by the pressure of the atmosphere pushing down on the mercury in the dish, rather than the cross-sectional area of the barometer tube. This height is a result of balancing the weight of the mercury with the atmospheric pressure. Changing the cross-sectional area would only affect the amount of mercury needed to create this balance, not the height of the column.
When air pressure increases, the mercury in a barometer rises.
It is a measure of pressure exerted by a column of mercury which is 165 mm in height.
The height of the mercury column in the tube represents the balance between the atmospheric pressure pushing down and the pressure exerted by the column of mercury pushing up. With a height of 735 mm, the atmospheric pressure can be calculated as 735 mm Hg or 735 torr.
Pressure tendancies measure short term weather. The mercury in a barometer will rise with atmospheric pressure denoting fairer weather and a fall in barometric pressure warns of inclement weather.
The height of the Mercury column would decrease.
Mercury is used in barometers as it is a dense liquid that allows small changes in atmospheric pressure to be measured accurately. The height of the mercury column in the barometer is directly related to the atmospheric pressure. By comparing atmospheric pressure to the height of mercury in a barometer, the pressure can be quantified in units of millimeters or inches of mercury.
the atmospere can not support the greater height column and the column of mercury will drop to the level in which the atmospere can support