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To measure pressure above atmospheric pressure you would use a?
mercury manometer
To measure a pressure above atmospheric pressure you would use?
You would use a mercury manometer
How do you use a manometer?
A manometer is a device that is used to measure the pressure of a fluid. The U-shaped glass tube is partially filled with a liquid, usually mercury. The difference between the height of the mercury corresponds to the difference between the pressure of the fluid in the container and the atmospheric pressure.
Why is mercury a better liquid to use in manometer than water?
Water can be used up to only 100 degree celsius. mercury can be used 356 degree celsius Water has a tendency to evaporate. The density of water is about 13 times lower than that of mercury, so some pressure levels would need a very large manometer tube.
How do you use YouTube manometer?
I think you're looking for U-Tube Manometer
Why Mercury is used in manometer?
Mercury is used due to its higher specific gravity allowing the manometer physical size to be smaller in direct proportion to the weight of mercury vs weight of water.and its vapour pressure is negligible.these are the two reasons .
What is an electrical manometer?
Electrical manometer is an electronic manometer use to record pressures between two points. It is commonly used in recording pressure in bridges.
Why use a manometer?
because you want to
Where use manometer?
To determine Pressure
Basic use for a manometer?
To determine pressure
What unit of measurement does a manometer use?
A manometer measures pressure. The units depend on the type of manometer and how it's calibrated. Units include psi, barr, Torr, atm, pascals, and kilopascals.
Why you use mercury manometer to measure atmospheric pressure at sea level rather alcohol?
Mercury has two advantages over alcohol when it comes to measuring pressure in a manometer: 1) it is far denser than alcohol. A column of mercury need only be about 760 mm ( about 3/4 of a meter) high to exert a pressure equal to atmospheric pressure at sea level. Alcohol would have to be over 13 meters high to reach the same pressure! (rather impractical) 2) Mercury has a very low vapor pressure so it doesn't evaporate when exposed to the atmosphere. It also contributes a negligible amount of pressure above the column on the sealed end of the manometer for pretty much any atmospheric temperature. Alcohol has a significant vapor pressure so it would tend to evaporate when exposed to the atmosphere. It also has a high enough vapor pressure that it would contribute a noticeable amount of pressure on the sealed end of the manometer - and the pressure would vary quite noticeably over the range of temperatures that atmospheric manometers are commonly exposed to - so the manometer reading would always have to be corrected for temperature - more so than the mercury manometer must be.
