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Why would a water barometer have to be 13.6 times taller than a mercury barometer?
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∙ 13y ago
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What is the densest fluid present on earth?
The densest liquid at room temperature is Mercury which is 13.5 times heavier than water.
Which instrument is often filled with mercury or colored water or alcohol?
Thermometers are the instrument that is often filled with mercury, colored water, or alcohol. Most early thermometers were made with mercury.
What happens when Mercury is in water?
Metallic mercury in water can be dispersed into the water column in several forms; * Metallic mercury as colloidal dispersions * Soluble mercury salts resulting from the reaction of mercury with chlorides or sulfates * Methylated mercury from the action of aquatic bacteria on metallic mercury * As a contaminant in any of the above forms on soil particles in the water Methylated mercury is easily taken up by the food chain and can accumulate in predatory fish. Eventually mercury in the water is deposited with sediments into the bottom of watercourse and will be isolated by subsequent siltation.
What is mercury water gold and oxygen from densest to the least dense?
(most dense to least dense) gold, mercury, water, oxygen
What is the conversion of vacuum in inches of water to vacuum in inches of mercury?
There's no such thing as "mercury vacuum". A volume of space can have solid mercury, liquid mercury, or mercury vapor in it, or it can be a vacuum. The weight of the "standard atmosphere" on any area is the same as the weight of a column of mercury 29.92 inches high on that same area, with no air above the mercury.
Water is not used as barometric liquid?
Mercury is having a higher specific density ( about 13 times that of water) . So if we want to make a barometer using water it should be at least 13 times the length of mercury barometer that is about 11m so it is advisable to use mercury as a barometric liquid.
What deos a barometer measure?
A barometer is used to measure air pressure. It measures the atmospheric pressure using air, mercury, or water and will be shown as inches of mercury or millibars.
What accounts for the difference in heights of mercury vs water columns?
Density
Why is it mercury rather than water used in barometer and in blood pressure measurements?
A water barometer would have to be many feet tall because the density of water is much lower than that of mercury. In addition, the vacuum above the column would be spoiled by the water vapor pressure, far higher than that of mercury, and strongly temperature dependent.
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.
Why is mercury used in barometers instead of water?
Because it has a high density... meaning that the volume increase or decrease due to altitude change is can be viewed in a practical sized barometer. If water, which had a much lower density, was used instead of mercury, the barometer must be at least 15m high.
Why is Mercury used in barometers?
In the mercury barometer, atmospheric pressure balances a column of mercury, the height of which can be precisely measured. Other liquids can be used in barometers, but mercury is the most common because of its great density.Mainly due to its high density
Why is barometer useful?
Because it has a high density... meaning that the volume increase or decrease due to altitude change is can be viewed in a practical sized barometer. If water, which had a much lower density, was used instead of Mercury, the barometer must be at least 15m high.
What happens if you use water instead of mercury in determination of atmospheric pressure?
I'm not sure if this answer is the kind of answer you're looking for, but basically, you would have to use a much larger amount of water than mercury to get an accurate reading of atmospheric pressure. This is because water is not nearly as dense as mercury, so it takes much less atmospheric pressure to raise the water up the tube in a water barometer. This results in water rising much more easily than mercury. Obviously, then, a water barometer would have to be much larger than a mercury one. Since mercury is more dense than water, mercury barometers are much smaller. So, if you put water in a mercury barometer instead of mercury, the reading you get would be way too high.Air pressure at sea level is about 14.7 pounds per square inch (psi) and can push a column of water almost 33 feet high, but it can only push mercury 30 inches high. Roughly, ever inch of mercury equals a foot of water.
How will you set up a simple barometer in the laboratory?
In most laboratories, with great difficulty. Mercury is a highly toxic substance and its use is very strictly controlled.A mercury barometer is simple because the height of the mercury column would be 760 mm (approx 30 inches). Mercury has a density which is around 13.6 times that of water. The next most dense fluid which is readily available (and safe) has a density which is about a tenth as much. For this, you would require a column which was about 7.6 metres (25 feet) tall! That is not a simple piece of equipment.
What type of barometer used in aircraft?
Aircraft use an Aneroid Barometer, which uses a bellows and spring to measure changes in the earth's atmosphere from air pressure, unlike mercury or water barometers which use a liquid to measure these changes.
Why is the fluid in a barometer rather than water or another liquid?
Because Mercury is heavier than water, therefore it takes more atmospheric pressure to make the mercury move. However, there are aneroid barometers, which don't have any fluid in them at all.
