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Why does the height of the liquid column in a barometer changes as atmospheric pressure changes?
Wiki User
∙ 11y ago
Wiki User
∙ 14y agocool im just learning about this! :p im taking an educated guess but i think it does Yes, it does. I might be wrong, though...
Wiki User
∙ 11y agoAs the atmospheric pressure changes, the force pushing on the surface of the liquid changes. Therefore,the height of the liquid in the tube increases as the atmospheric pressure increases.
Wiki User
∙ 7y agoThe height of the mercury column is affected by the atmospheric pressure.
Wiki User
∙ 7y agoThe height of the mercury column is directly proportional to the atmospheric pressure. So changes in the atmospheric pressure will result in changes in the height of the column.
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What does a decrease in the height of the mercury column usually indicate on a barometer?
low pressure system and stormy weather
Why does atmospheric pressure change as you go up in altitude?
Atmospheric pressure changes with the weather. Cold air is heavier than warm air. Suspended particles or moisture will also increase pressure. http://en.wikipedia.org/wiki/Barometer
How do fortin barometers work?
The way the Fortin barometer works is different in a sense that it uses atmospheric pressure to balance the weight of a column of mercury against it. From that, any change in the atmospheric pressure is accompanied by an immediate change in the level of the mercury and can be measured against the scale engraved on the barometer.
An altimeter is an adaptation of the?
The altimeter is basically a specialized pressure gauge. It measures the pressure of the column of air above it. As the altitude varies, the air column height varies, which registers on the altimeter. Since the air pressure also varies with changes in the barometric pressure, altimeters must have an adjustment to compensate for changes in local barometric pressure.
What are the difference between the mercury barometer and aneroid barometer?
A mercury barometer works by, measuring the height of a column of mercury in a sealed tube, supported by the atmospheric pressure.An aneroid barometer measures the amount of distortion of a sealed metal can, due to changes in atmospheric pressure. The equivalent column of mercury supported by a mercury barometer, can then be calibrated in mmHg by comparison.Both instruments do the same job and can be calibrated in Millibars or mmHg, or both.
Why does the height of the column in a barometer changes as atmospheric pressure changes?
As the atmospheric pressure changes, the force pushing on the surface of the liquid changes. Therefore,the height of the liquid in the tube increases as the atmospheric pressure increases.
What does a decrease in the height of the mercury column usually indicate on a barometer?
low pressure system and stormy weather
Why must a barometer be place where are no temperature extremes?
The height of the mercury column is used to measure atmospheric pressure. If the barometer is also subjected to high temperatures, the thermal expansion of the mercury column will indicate a higher pressure than is really the case. This will make the barometer readings useless.
Why does atmospheric pressure change as you go up in altitude?
Atmospheric pressure changes with the weather. Cold air is heavier than warm air. Suspended particles or moisture will also increase pressure. http://en.wikipedia.org/wiki/Barometer
How do fortin barometers work?
The way the Fortin barometer works is different in a sense that it uses atmospheric pressure to balance the weight of a column of mercury against it. From that, any change in the atmospheric pressure is accompanied by an immediate change in the level of the mercury and can be measured against the scale engraved on the barometer.
An altimeter is an adaptation of the?
The altimeter is basically a specialized pressure gauge. It measures the pressure of the column of air above it. As the altitude varies, the air column height varies, which registers on the altimeter. Since the air pressure also varies with changes in the barometric pressure, altimeters must have an adjustment to compensate for changes in local barometric pressure.
What does a rising barometer tell you?
Mercury in the tube adjusts until the weight of the mercury column balances the atmospheric force exerted on the reservoir. High atmospheric pressure places more force on the reservoir, forcing mercury higher in the column.
What is the best cause of atmospheric pressure?
Gravity. Atmospheric pressure is the weight of a column of air. Of course, the temperature of that air changes it's density and therefore it's weight (i.e. pressure)
Who discovered atmospheric pressure?
Evangelista Torricelli discovered atmospheric pressure. Secretly, he created an expierement with some of his friends. By filling a bowl with mercury and placing a six foot long glass tube upside down into it, a vacuum was created, causing the mercury to rise up. This was an early barometer. The reason this expierement was kept secret was probably because in 1643, this would have been considered witchcraft because a vacuum was considered impossible.
Why water is not used as the medium for measurement of atmospheric pressure?
Purely a matter of convenience. A water barometer is entirely feasible, but the column height at normal atmospheric pressure is over 32 feet tall. In order to make the barometer more compact, it's convenient to use the heaviest available liquid. Mercury has a little more than 13 times the density of water, so the column height in a mercury barometer is only about 30 inches tall, making for a much more manageable instrument.
Antique aneroid barometer has a scale of 28 to 31 what units are these?
A meterological type of barometer uses a column of mercury that is supported by atmosperic pressure. The height of this column varies with the atmospheric pressure and was at one time measured off in inches in the range of about 28 to 31 "inches of mercury". The scale now used is Millibars both in aneroid and mercury barometers.
Why is the value of atmospheric pressure compared to mercury?
Atmospheric pressure will support a column of mercury to about 760 mm. Mercurial air pressure is described as '760 mmHg'. As air pressure changes , the height of this column will also change. If you did it with water, the column would have to be about 34 feet (10.2 metres) in height.
