Mercury barometers are primarily used for measuring atmospheric pressure. It is a device that consists of an upside-down tube filled with mercury that is in a vessel full of mercury.
The atmosphere (or the air) pushes down on the mercury in the vessel
, which in turn, pushes the mercury in the tube up.
What does the aneroid barometer do?
An aneroid barometer has a
sealed metal chamber that expands and contracts
, depending on the atmospheric pressure around it. Mechanical tools measure how much the chamber expands or contracts. These measurements are aligned with atmospheres or bars.
What is the function of a mercury barometer?
A mercury barometer is an instrument used
to measure atmospheric pressure in a certain location
and has a vertical glass tube closed at the top sitting in an open mercury-filled basin at the bottom. Mercury in the tube adjusts until the weight of it balances the atmospheric force exerted on the reservoir.
How does a mercury barometer move?
The best advice we can give is to
just tilt the barometer slowly and gently to 45 degrees and let the top of the tube fill with mercury, then transport the barometer at that angle
. Be sure to wrap the barometer in a good, stout plastic bag to contain any possible mercury spills, and cushion it well.
What is the principle of barometer?
A barometer is
essentially a balance
. The weight of the atmosphere is balanced by the weight of a much shorter mercury column. You can’t use an ordinary pan balance to weight the atmosphere (because air is pushing down on both sides).
What are the 10 uses of mercury barometer?
- Measurement of atmospheric pressure.
- Determining the altitude of a place.
- Weather Forecasting.
- Calibration and checking of aneroid barometers.
- Application in Fluid Mechanics.
- Measurement of pressure in aircrafts.
- Surface Weather Analysis.
- Preparation of Barographs.
What is mercury barometer in detail?
A Mercury Barometer is
a barometer with a glass tube that is closed on one end and open on the other side that is lowered in a mercury reservoir at the base
. … The higher the atmospheric pressure is, the more pressure it will put on the mercury reservoir, forcing the mercury to rise up in the column.
What is the basic principle of aneroid barometer?
An aneroid barometer is an instrument used to measure atmospheric pressure. The name “ANEROID” itself means ‘without water’ , that gives clear indication that there is no involvement of liquid. Principle:
A metal box partially exhausted of air (vaccum) will undergo changes of shape as the outside pressure varies.
What are the 10 uses of aneroid barometer?
- It is often used for reading pressure in homes and recreational boats.
- Other uses may include barographs in metrology and altimeters in modern aircraft.
- It can store a week’s worth of data.
- For weather forecasts.
- For the Earth’s atmosphere.
What is barometer with diagram?
Simple barometer – diagram
An inverted glass tube is standing in the bath of mercury and air pressure is exerted on the surface of mercury. The pressure at the top of the mercury column is zero as there is a vacuum there. Due to atmospheric pressure we can see some raise in glass tube.
Does my barometer work?
Hold the instrument at the 45-degree angle and check the
dial
on a “wheel” or “banjo” barometer. If the barometer is working correctly, the indicator needle will move swiftly in a clockwise direction until it goes past the end of the scale marked on the dial.
Where should I hang barometer?
While an inside or outside wall won’t make a difference in your barometer’s performance, placing it too
near a heat source
may. Situate your barometer so that it is not near a heating vent or sitting in direct sun. This is especially important if your barometer is also a combination thermometer.
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 is barometer and how it works?
The barometer works
by balancing the weight of mercury in the glass tube against the atmospheric pressure
, much like a set of scales. … In areas of high pressure, air is sinking toward the surface of the earth more quickly than it can flow out to surrounding areas.
