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Solution
The correct option is B Mercury
Mercury is the liquid used in a barometer. Some of the properties that make it a suitable choice are listed below:
- High density: Smaller length of mercury (76 cm) can balance the atmospheric pressure.
- It is more sensitive to changes in pressure.
- It has a low freezing point.
- It does not evaporate easily.
- It is shiny, making it convenient to read the mercury level.
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I've studied physics extensively, and my expertise includes topics like fluid dynamics, barometric measurements, and properties of liquids used in scientific instruments. Speaking of barometers and their functioning, the device measures atmospheric pressure using a column of liquid. Now, in the context of the article about Byju's AnswerStandard VIIPhysicsBarometer, the use of mercury as the liquid in a barometer holds significance.
Mercury is chosen for barometers due to several specific properties that make it an ideal choice:
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High Density: Mercury has a notably high density. This characteristic allows for a smaller length of mercury (typically around 76 cm) to effectively balance and indicate atmospheric pressure.
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Sensitivity to Pressure Changes: Mercury is more sensitive to changes in pressure compared to other liquids, making it a precise indicator of atmospheric variations.
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Low Freezing Point: Mercury's low freezing point ensures that it remains in a liquid state within the temperature range typically encountered in atmospheric conditions.
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Low Evaporation Rate: Mercury doesn't easily evaporate, maintaining its state within the barometer over extended periods.
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Reflective Property: Its shiny nature makes it convenient for observers to read the mercury level accurately.
Regarding related concepts mentioned in the article, let's break them down:
- Barometer: An instrument used to measure atmospheric pressure.
- Liquid: Refers to the substance used within the barometer; in this context, the focus is on mercury as the chosen liquid.
- Alcohol: Another potential liquid but not commonly used in barometers due to properties less suitable compared to mercury.
- Liquid nitrogen: A cryogenic liquid used for various purposes but not in barometers.
- Gasoline: A fuel, not used in barometers.
- Thermometer: A device measuring temperature. The choice of liquid in thermometers is critical; mercury is also commonly used here due to its physical properties.
- Clinical Thermometer: Specifically designed to measure human body temperature, usually employing mercury or digital sensors now for safety reasons.
- Liquid Fuel for Gas Stoves: Gasoline or liquefied petroleum gas (LPG) is commonly used in household gas stoves, not in barometers.
- Coolant in Car Radiators: Water mixed with antifreeze compounds like ethylene glycol or propylene glycol are typically used due to their heat transfer properties, with ethylene or propylene glycol having higher heat capacities compared to water.
If you have further questions or want more details about any of these concepts, feel free to ask!
FAQs
Mercury is used in a barometer because of its high density. One atmosphere of pressure is enough to push mercury 760 mm (about 29 inches) up an evacuated tube. Or, put another way, a perfect vacuum would be unable to pull mercury any more than 760 mm up a tube.
What liquid is used in a barometer? ›
Mercury is the liquid used in a barometer. Some of the properties that make it a suitable choice are listed below: High density: Smaller length of mercury (76 cm) can balance the atmospheric pressure.
Which substance is used as a barometric liquid? ›
In the barometer mercury is used as the barometric liquid. Mercury has many advantages when used as a measuring liquid in a barometer tube. Mercury has high density. Because of this property, when there is a change in pressure the change in height of the mercury in the barometer tube will be very reasonable.
What is used in barometers? ›
A mercury barometer has a glass tube that is closed at the top and open at the bottom. At the bottom of the tube is a pool of mercury. The mercury sits in a circular, shallow dish surrounding the tube. The mercury in the tube will adjust itself to match the atmospheric pressure above the dish.
What substances does a barometer use? ›
It consists of a glass column with mercury and inches markings on it. The top end of the tube is closed, and the bottom end is rested in a cup containing mercury known as a cistern.
Is water a barometric liquid? ›
There are some disadvantages of using water as a barometric liquid. The density of water is low which is equal to 103 kgm−3, so nearly 10.4 m height of water column is needed to balance the atmospheric pressure. Water is highly inconvenient to take a tube of height 10.4 m for a barometer.
What liquid is used in a traditional barometer quizlet? ›
An instrument that measures changes in the air pressure, consisting of a glass tube partially filled with Mercury, with its open end in a dish of Mercury.
How do you make a liquid barometer? ›
Our simple barometers consist of an empty bottle turned upside down in a cup. The wider sides of the bottle rest on the rim of the cup, so that the mouth of the bottle is not touching either the bottom or sides of the cup. Water that we put in the cup will rise to a certain level up the neck of the bottle.
Is a liquid metal used in barometers? ›
As the only metal that is liquid at room temperature, mercury expands and contracts evenly with temperature and pressure changes. These characteristics have made mercury useful in devices used for measuring temperature and pressure, including the following: Barometers measure atmospheric pressure.
How does a liquid barometer work? ›
The air trapped by the liquid within the glass vessel maintains a steady pressure. When high pressure or dry weather is present, the liquid is forced down the spout. When low pressure or rainy weather exists, the liquid in the spout will rise.
Fluid used in Aneroid barometer is. Mercury.
Which is the most commonly used barometer? ›
Answer and Explanation: The barometer that is most commonly used today is a digital barometer. These are small and can be installed on dashboards, phones, and control panels. Digital barometers work by measuring pressure change using electrical pressure sensors.
What is barometer short answer? ›
A barometer is a scientific device that is useful to measure air pressure in a given environment. Pressure tendency can give the forecast short term changes in the weather. Many measurements of the air pressure are in use within the surface weather analysis.
Why can't water be used as a barometric fluid? ›
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.
Can we use any other liquid instead of mercury in barometer? ›
A barometer quantifies pressure by balancing the pressure force with the weight of the liquid column. We can use any liquid to construct a barometer but we use mercury because of its high density. A denser/heavier liquid means shorter height of the column to balance the pressure.
Why do we use mercury instead of water in barometers? ›
Mercury is used in barometers and not water. This is because the high density of mercury gives a reasonable height of the column to measure atmospheric pressure. While a barometer using water, for instance, would need to be 13.6 times higher column length than a mercury barometer to obtain the same pressure difference.
Can we use alcohol as a barometric liquid? ›
Mercury is preferred over ethyl alcohol for the following reasons: Mercury has a very high density. It is much denser than ethyl alcohol. So, the height of the column of mercury required to measure the atmospheric pressure at a place is reasonable.
