What is mercury barometer and its uses?
What is mercury barometer and its uses?
A mercury barometer is used to calibrate and check aneroid barometers. Calibration can be, for example, in terms of atmospheric pressure or altitude above sea level. The concept of altitude above sea level, based on barometric pressure, is used to create one type of aircraft altimeter.
What is mercury barometer?
A mercury barometer is a barometer with a column of mercury whose height varies according to the atmospheric (barometric) pressure. A barometer is an instrument for measuring atmospheric pressure, which is used in forecasting the weather.
Where are mercury barometers used?
Mercury barometers are commonly used for measuring the air pressure. It is known that above and below the sea, with the distance, air pressure…
Why mercury is used in barometer?
Mercury is employed in the barometer because its density is sufficiently high for a relative short column to be obtained. and also because it has very small vapour pressure at normal temperature. High density scales down the pressure head(h) to repesent same magnitude of pressure in a tube of smaller height.
What are the 10 uses of mercury barometer?
Measurement of atmospheric pressure.
What is the principle of a mercury barometer?
Thus, in a barometer, one end is sealed to prevent air from disturbing the scale and measures. Therefore, a Mercury Barometer works on the principle of balancing the atmospheric pressure with the volume of mercury present in the device.
What is barometer and its uses?
A barometer is a scientific instrument used to measure atmospheric pressure, also called barometric pressure. Changes in the atmosphere, including changes in air pressure, affect the weather. Meteorologists use barometers to predict short-term changes in the weather.
Why is water not used in barometer?
Water is not a suitable barometric liquid because: (i) The vapour pressure of water is high, so its vapours in the vacuum space will make the reading inaccurate. (ii) Water sticks with the glass tube and wets it, so the reading becomes inaccurate.
What are uses for mercury?
Although many liquids could be used in pressure measuring devices, mercury is used because its high density requires less space. It is also a good conductor of electricity, so it is a useful component of electrical switches. Mercury is also used in dental fillings, paints, soaps, batteries, and fluorescent lighting.
Who first give the principle of barometer?
The principle of the mercury barometer was discovered by the Italian physicist Evangelista Torricelli in about 1643. That principle can be illustrated as follows: a long glass tube is sealed at one end and then filled with liquid mercury metal.
What are the two uses of barometer?
List out the uses of barometer
- Weather Forecasting.
- Calibration and checking of aneroid barometers.
- Measurement of pressure in aircraft.
- Preparation of Barographs.
- Preparation of aircraft altimeters.
- Application in Fluid Mechanics.
- Mercury barometers are used for surface weather analysis.
What is the main use of barometer?
A barometer is a scientific instrument that is used to measure air pressure in a certain environment. Pressure tendency can forecast short term changes in the weather. Many measurements of air pressure are used within surface weather analysis to help find surface troughs, pressure systems and frontal boundaries.
How does a mercury barometer work in petropedia?
Petropedia explains Mercury Barometer. A Mercury Barometer is a special barometer that has a mercury filled base at the bottom and a tube with an open end and closed end dipped into it. The Mercury Barometer works under atmospheric pressure which makes the mercury in the reservoir to move up the tube.
Who was the inventor of the mercury barometer?
…with the invention of the mercury barometer by Evangelista Torricelli, an Italian physicist-mathematician, in the mid-17th century and the nearly concurrent development of a reliable thermometer. (Galileo had constructed an elementary form of gas thermometer in 1607, but it was defective; the efforts of many others finally resulted in a…
How does atmospheric pressure affect a mercury barometer?
In barometer In the mercury barometer, atmospheric pressure balances a column of mercury, the height of which can be precisely measured. To increase their accuracy, mercury barometers are often corrected for ambient temperature and the local value of gravity. atmospheric pressure.
How does the Fortin barometer measure atmospheric pressure?
Fortin barometer. The mercury barometer’s design gives rise to the expression of atmospheric pressure in inches or millimeters or feet (torr): the pressure is quoted as the level of the mercury’s height in the vertical column.