Mercury has a sudden fall and then the barometter measure it and when i mean by fall i mean air pressure so yeah it's cool I knoe it doesn't make sense but Im just writing this anyway. Even though it's pure glorius silly you know what. I PUT THAT WORD BUT THEY WON'T LET ME POST THIS STUPID ANSWER
there are various type of barometers viz. mercury barometer, aneroid barometer, precission aneroid barometer. Barometer thus calculate the pressure exerted over a unit area by the column of air over that area.
Yes, both devices measure air pressure. The difference is the mercury barometer is filled with a liquid which could spill (and mercury is toxic) while the aneroid barometer contains no liquid.
i don't know that why i am asking you
The mercury expands or contracts.
mercury barometers and aneroid barometers both measure air pressure.
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.
Maybe you mean what does a mercury barometer measure. In which case the answer is atmospheric pressure.
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.
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.
They both measure air pressure, but in different ways
anaeriod barometer and a mercury barometer
Usually the instrument used is called a barometer- which could be a closed end manometer or an aneroid barometer.An altimeter actually also measures atmospheric pressures - but for a different purpose.
Mercury barometer precaution
Mercury
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.
The answer to this question is, the Mercury and aneroid barometer
Probably a mercury barometer and a aneroid barometer. -adrian
mercury barometers and aneroid barometers both measure air pressure.
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.
A Mercury barometer is used to measure atmospheric pressure.
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.