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low pressure system and stormy weather
The height of the mercury column is not affected by the diameter of the tube. Here is the proof: Pressure is force per unit area; P =F/A. Force, F = mass (m) x gravity acceleration (g), and mass = density( d) x volume (V) Therefore, P = (d x V x g) / A. Since volume (V) = Area (A) x height (h), then P = (d x A x h x g) / A, which upon cancelling A from numerator and denominator gives P = d x h x g. This shows that diameter of the tube has no effect on height of mercury inside the barometer tube.
To reset a mercury barometer after travel, first ensure the barometer has settled to room temperature. Then, carefully check for any air bubbles in the mercury column and gently tap the barometer to release any trapped air. Finally, adjust the mercury column height to match the current atmospheric pressure by turning the adjustment screw if needed.
The pressure at the bottom of a 76 cm column of mercury in a barometer would be equal to the atmospheric pressure pushing down on the mercury column. This is because the height of the mercury column in a barometer is directly related to the atmospheric pressure. Thus, the pressure at the bottom of the mercury column would be the same as the air pressure at the bottom of the atmosphere.
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.
When air pressure increases, the mercury in a barometer rises.
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
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air pressure is decreasing
The height of the Mercury column would decrease.
As a mercury barometer is taken up a mountain, the height of the mercury column would decrease. This occurs because atmospheric pressure decreases with altitude, leading to less force exerted on the mercury in the barometer. Consequently, the lower atmospheric pressure results in a shorter column of mercury being supported.
low pressure system and stormy weather
The height of the Mercury column would decrease.
The height of the Mercury column would decrease.
The height of the Mercury column would decrease.
The height of the Mercury column would decrease.