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Why is mercury used in the liquid barometer and thermometer?
It is used in the barometer because it is the densest liquid known, requiring only 33 inches of mercury to indicate atmospheric pressure. Water on the other hand would require 39 feet to indicate the same pressure. It is used in thermometers for a different reason. The expansion of mercury is a stable amount. Meaning it changes in volume the same amount from 0 to 1 degrees as it does in volume from 100 to 101 degrees, making it a desirable fluid for scaling thermometers. Presently in the US it is illegal to manufacture these devices using mercury.
If a barometer reads 535 mm Hg what is the atmospheric pressure expressed in centimeters of mercury?
mmHg represents the height of a column of mercury (Hg) in millimeters (mm) (as opposed to inches of mercury (inHg)). Since there are 10 mm (millimeters) in a centimeter, simply divide the mmHg by 10 and you find that 535mmHg is 53.5 centimeters Hg (cHg?).
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.
What happens when the mercury in barometer or manometer is replaced by water or any other less dense liquid than water?
Since water is lighter than mercury, this means the height will differ. The denser (high relative density) the fluid, the shorter the height. If the fuild is light such as water its height will be much higher than that of mercury. Also, the denser the material is the higher the pressure.
How is a barometer different than a hydrometer?
Barometer is used to measure atmospheric pressure. Hydrometer is used to measure specific gravity.
Types of Barometers?
anaeriod barometer and a mercury barometer
What are the Precautions for aneroid and mercury barometer?
Mercury barometer precaution
An aneroid barometer is different from a mercury barometer in that it does not contain?
Mercury
Which statement accurately describes a difference between a mercury barometer and an aneroid barometer?
One statement to accurately describe a difference between a mercury barometer and an aneroid barometer is that a mercury barometer is a closed tube containing mercury. An aneroid barometer is a closed, flexible container of gas.
What is the difference between Mercury barometer and a aneroid barometer?
their spelling is different.
What is the difference between the aneroid barometer and a mercury barometer?
their spelling is different.
What type of barometer was invented first the aneroid or the mercury?
The first barometer that was invented was the MERCURY barometer. a mercury barometer consists of a glass tube open at the bottom end and partially filled with mercury. (:
What is an aneroid barometer called?
Well, an aneroid barometer, is called an aneroid barometer- but, a barometer measures air pressure, and an aneroid barometer is a barometer that contains no liquid.
Which liquid is used in an aneroid barometer a mercury b alcohol c none?
mercury
What is the most commonly used barometer?
The most commonly used barometer is the mercury barometer.However, it is not easy to transport but it gives more accurate results. Another type of barometer is Aneroid barometer which is easy to transport and handle.
How are the Mercury and aneroid barometers alike?
mercury barometers and aneroid barometers both measure air pressure.
What is the difference between how air pressure is indicated in a mercury barometer and an aneroid barometer?
Usually no difference at all. They can both move a pointer around a circular scale. The scale can be calibrated in both Inches of Mercury (InHg) or Millbars (Mb). An aneroid system can lend itself more easily to a digital display.
