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Why is mercury used as a barometric liquid

Mercury is used in barometers because of its high density. At 13.9 g/cm^2, mercury is the most dense substance to exist as a liquid at room temperature. By comparison, water has a density of 1.00.. Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure. A barometer using water, for instance, would need to be 13.6 times taller than a mercury barometer to obtain the same pressure difference. New questions in Physic Best answer Mercury is used as a liquid in a barometer because. (i) The height of the column in a barometer is inversely proportional to the density of the liquid, i.e. less dense the liquid, higher will be the column. Because of high density of mercury, it supports column of convenient height in a barometer Why is mercury used as a barometer liquid? Science teachers usually explain that cistern barometers contain mercury because water barometers are too tall to fit in a typical room. Since mercury has a density 13.6 times that of water, mercury barometers can be 13.6 times shorter than water barometers

Because of much higher density of mercury, a mercury column needed for barometric measurements is much shorter than a water column. Mercury does not wet a glass surface the way water wets a glass surface. This makes mercury column distinct and clearly visible. 268 view Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure. A barometer using water, for instance, would need to be 13.6 times taller than a mercury barometer to obtain the same pressure difference. Click to see full answer The reading of a barometer containing some air above the mercury column is 73cm while that of a correct one is 76 cm. If the tube of the faulty barometer is pushed down into mercury until volume of air in it is reduced to half, the reading shown by it will b A: Mercury has been used in heat and pressure measuring instruments since the first intruments were made.. Metals are very good conducters of heat. They expand and contract depending on the pressure or temeperature of their environment. Mercury is the only one which is liquid at room temperature, which makes it easy to work with Mercury is the most ideal liquid for the barometer due to the following three reasons: 1) It is the heaviest liquid. Therefore it rises to a height of only 76 cm to balance the atmospheric pressure. 2) It gives more accurate reading as it does not stick to the glass

Why is mercury used in Barometers? - eNotes

  1. Manometers has Liquid Mercury as very essential Part. The main reason why mercury used is because of it's quite dense (13600 kg/m^3; cf water at 1000 kg/m^3), so atmospheric pressure can be balanced by a column of liquid mercury only 760 mm high, whereas you would need 10.3 m of water
  2. Why is mercury preferred as a barometric substance over water? mechanical properties of fluids; class-11; Share It On Facebook Twitter Email. 1 Answer +1 vote . answered Jan 1, 2020 by SurajKumar (66.2k points) selected Jan 2, 2020 by Nishu03 . Best answer.
  3. It is a device used to measure atmospheric pressure. In this device, we use mercury to measure the pressure. Higher the atmospheric pressure more will be the reading on the scale. In theory, we can..

why mercury is used as a barometric liquid - Brainly

  1. Why mercury is used in barometer instead of water
  2. The biggest 2 reasons are that it's liquid and it's heavy. You could make a barometer out of any liquid, but it you made it from water, it would have to be about 30 feet high. Heavier liquids need..
  3. In addition, mercury is the only metal that is a liquid at room temperature, making it an attractive candidate. It is also cheap to acquire and very accurate at measuring high temperatures. Lastly, you do not need an external power source like a battery or electricity to run a mercury thermometer
  4. Mercury is only toxic in certian states such as a gas. Mercury is not used in Thermometers anymore because of the toxic levels, but since a barometer isn't used in the mouth they still use it. 0

Why mercury is used as a liquid in a barometer? Explain

The inert gas increases the pressure on the liquid mercury, thereby increasing its boiling point even further. Related Articles. Related Articles. One can also extend its freezing point by alloying it with thallium. These new mercury-thallium thermometers can now measure temperatures as low as -62ᵒC. Still, despite their small flaws, mercury. Barometer, device used to measure atmospheric pressure. Because atmospheric pressure changes with distance above or below sea level, a barometer can also be used to measure altitude. There are two main types of barometers: mercury and aneroid. Learn more about barometers in this article Purpose of the Mercury: A barometer is an instrument used to measure atmospheric pressure. The level of mercury in the barometer rises or falls with changes in pressure, corresponding to a change in the weather pattern People tend to associate mercury with its silvery liquid form - perhaps found in old thermometers. It was also used in electrical switches or relays that were built into machines until the mid. Mercury is the only metal that is in liquid state at room temperature. It is used in thermometers because it has a high coefficient of expansion which makes it easy to move in the thermometers as per the temperatures. Mercury has a boiling point which makes it suitable to measure higher temperatures

It is widely used in the construction of barometers and thermometers. The barometer was invented by Evangelista Torricelli in 1643, and the thermometer by Gabriel Fahrenheit in the year 1714. The most peculiar characteristics about these measuring instruments were that both used mercury as the liquid because of its less linear expansivity Why are we using Mercury in thermometer, reasons are followed:. The melting point of water is 0 o c but when you see mercury freezing point (melting point) -38.83 o c and the boiling point of the mercury is 356.73 o c. The boiling point of water is 100 o c. So based on this criteria the mercury is having the temperature reading capacity compared to water Pressure and the simple mercury barometer. This is the currently selected item. Definition of an ideal gas, ideal gas law against the air and when the pressure of the rising mercury meets the pressure of the atmosphere pushing down on the liquid surface the mercury that's that's in the tube it can't flow anymore so the pressure in the. Mercury is used in a barometer because it is liquid at room temperature. The only other element with this property is bromine, which is much harder... See full answer below

Give a reason why mercury is preferred as a barometric liquid 2mks 7 A drawing from PHYSICS MISC at Institute for Studies in Theoretical Physics and Mathematics (IPM Mercury is used in barometers due to its high density. allows mercury to be used in a small container. If you used water for example, which has a low density, your barometer would have to be around..

Manometers has Liquid Mercury as very essential Part. The main reason why mercury used is because of it's quite dense (13600 kg/m^3; cf water at 1000 kg/m^3), so atmospheric pressure can be balanced by a column of liquid mercury only 760 mm high, whereas you would need 10.3 m of water. Read more: Top Reasons why Mercury Used in Manometer Mercury has a high density compared to other liquids, which is why we use it in barometers Pressure= hpg, where h denotes the height of the liquid, p denotes the density of the liquid and g denotes.. Why mercury is used as a thermometric liquid? Thermometer: After this lesson, you should better understand where barometric pressure values come from and why we care Mercury has been used in heat and pressure measuring instruments since the first intruments were made. Metals are very good conducters of heat. They expand and contract depending on the pressure or temeperature of their environment. Mercury is the only one which is liquid at room temperature, which makes it easy to work with 3. (a) Why is mercury used as a barometric liquid ? (b) Determine an equivalent height, if water is used as a barometric liquid. Also explain why it is not used as a barometric liquid. (c) Calculate the equivalent height of a water barometer, if the pressure recorded by the barometer is 60cm of mercury. Density of mercury is

Mercury is a convenient liquid to use in a barometer because: A. it is a metal . B. it has a high boiling point . C. it expands little with temperature . D. it has a high density . E. it looks silver Mercury was used in scientific research largely as a result of Torricelli's 1643 invention of the barometer and Fahrenheit's 1720 invention of the mercury thermometer. While thermometers in the health care sector are no longer made with mercury, China still produces several measurement devices, such as blood-pressure meters, that contain.

Why is mercury used as a barometric liquid in a cistern

The biggest 2 reasons are that it's liquid and it's heavy. You could make a barometer out of any liquid, but it you made it from water, it would have to be about 30 feet high. Heavier liquids need a smaller height in order to match atmospheric pressure. Another advantage is that mercury doesn't evaporate very much The mercury barometer is the oldest type of barometer, invented by the Italian physicist Evangelista Torricelli in 1643. Torricelli conduct ed his first barometric experiments using a tube of water. Water is relatively light in weight, so a very tall tube with a large amount of water had to be used in order to compensate for the heavier weight. Mercury is used as thermometric liquid because of the following : it is good conductor of heat; it is shiny and opaque; it does not stick to inner wall of the capillary tube. It can measure from -39 degree C to 357 degree C

Mercury is preferred as a barometric liquid because: (i) The vapour pressure of mercury is almost negligible under vacuum conditions. Thus mercury barometer shows true atmospheric pressure. (ii) Mercury is the densest liquid (13.6 g cm -3) at room temperature Mercury has traditionally been used in pressure measurements (in manometers) and in thermometers. Mercury is a stable fluid at room temperature and has a high density

Why is mercury used in a barometer rather than water? - Quor

Water is not a suitable barometric liquid because: Water barometer will support 10.4m of water at sea level. It is impractical to have such a long tube. Explanation: water is not used in barometer as water has a very low density and this is why we use mercury. Explanation: please mark me as brainliest. New questions in Physics Mercury is a good conductor of heat. It is used in thermometers because it has a high coefficient of expansion. Its stage indicates the temperature as rapidly as potential and perfectly. Mercury is the only one in a liquid state at room temperature

Why is the fluid in a barometer mercury rather than water

Mercury is the most dense liquid available, therefore when using it, the barometric arrangement will be of a very convenient size. The heights of the water barometer ( h w ) and the mercury barometer ( h Hg ) ar 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 Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure. A barometer using water, for instance, would need to be 13.6 times taller than a mercury barometer to obtain the same pressure difference Why is it necessary to use a nonvolatile liquid in a barometer or manometer? All Chemistry Practice Problems Manometer Practice Problems. Q. The pressure of a sample of gas is measured with an open-end manometer, partially shown to the right. The liquid in the manometer is mercury. The liquid in the manometer is mercury. Determine the.

The commonly used barometric liquid in a barometer is Mercury

Really, for two reasons. One is in the barometer, there's a vacuum at the top, and the vacuum is pulling well. It's pulling because theater mus fear is pushing, so that's probably a better way to put it A liquid is used to make a mercury-type barometer. The barometer is intended for spacefaring astronauts. At the surface of the earth, the column of the liquid rises to a height of 2185 mm, but on. The most metals are solids at room temperature but the mercury is liquid form because it has high coefficient of expansion. The mercury does not stick to capillary wall of thermometer and which can easily measure temperature accurately Main Difference - Aneroid vs Mercury Barometer. A barometer is a device that is used to measure atmospheric pressure. Atmospheric pressure, sometimes also called barometric pressure, is the pressure due to the weight of air within the atmosphere of Earth. This atmospheric pressure changes from one point to another depending on the distance (height) from the sea level

Why is mercury used in pressure measuring instruments

Barometer is an instrument that is used to measure the atmospheric pressure. It consists of an inverted tube in a dish filled with mercury. Manometer is a device used to measure the pressure of a fluid. It consists of a U- shaped tube filled with a non-volatile liquid Ch. 11 - Why does atmospheric pressure decrease more... Ch. 11 - What are two reasons why mercury rather than water... Ch. 11 - Figure 11.41 shows how sandbags placed around a... Ch. 11 - Why is it difficult to swim under water in the... Ch. 11 - Is there a net force on a due to atmospheric.. Mercury is a convenient liquid to use in a barometer because: A) it is a metal B) it has a high boiling point C) it expands little with temperatur Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure. A barometer using water, for instance, would need to be 13.6 times taller than a mercury barometer to obtain the same pressure difference. This is because mercury is 13.6 times more dense than. Figure 3. In a barometer, the height, h, of the column of liquid is used as a measurement of the air pressure. Using very dense liquid mercury (left) permits the construction of reasonably sized barometers, whereas using water (right) would require a barometer more than 30 feet tall

what are the advantages of using mercury in a barometer

Mercury, also known as quicksilver, is one of only four metals that stay liquid at room temperature. Used for centuries in the medical industry, it has now become known as an environmental hazard and raised concerns about its use in industrial settings. It is one of the most dangerous metals known the right. The liquid in the manometer is mercury. Assuming atmospheric pressure is 29.92 in. Hg, determine the pressure of the gas in: (a) torr (b) Pa (c) bar Solution Since the mercury level is lower in the open arm of the manometer tube, atmospheric pressure is greater than the trapped gas pressure It is because of the following reasons:(i) Mercury is non-volatile at ordinary temperature, therefore, the pressure exerted by the vapours above the mercury column is very small and can be neglected.(ii) The height of the column in a barometer is inversely proportional to the density of the liquid. Since mercury is very dense, it is best for barometer as it supports column of convenient height Mercury is denser than water, consequently the length of the column of water would have to be about 34 feet high to find the pressure equal to that of the atmosphere while the column of mercury need to be only 30 inches to find the pressure equal to that of the atmosphere. Liquid Mercury has a very low vapor pressure than water

Top Reasons why Mercury Used in Manometer

Two advantages of using mercury as barometric liquid: (i) The density of mercury is greater than that of all the liquids, so only 0.76m height of mercury column is needed to balance the normal atmospheric pressure. (ii) The mercury neither wets nor sticks to the glass tube therefore it gives the correct reading State one reason why mercury is preferred as a barometric liquid and not water. State one reason why mercury is preferred as a barometric liquid and not water. Answers. 1. Mercury has low vapor pressure. It is more sensitive to changes in atmospheric pressure than water. 2. The freezing point of mercury is lower than that of water Mercury is often used in barometer because. A. It is the best liquid. B. The height of barometer will be less. C. Its vapour pressure is so low that it may be neglected. D. Both (B) and (C) Answer: Option The mercury barometer is the standard instrument for atmospheric pressure measurement in weather reporting. The decrease in atmospheric pressure with height can be predicted from the barometric formula. The unit mmHg is often called torr, particularly in vacuum applications: 760 mmHg = 760 tor

Mercury is a chemical element with the symbol Hg and atomic number 80. It is commonly known as quicksilver and was formerly named hydrargyrum (/ h aɪ ˈ d r ɑːr dʒ ər ə m / hy-DRAR-jər-əm). A heavy, silvery d-block element, mercury is the only metallic element that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these. Answer: becuase----Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. It also has a high boiling point which makes it very suitable to measure higher temperatures. Also, it has a shiny appearance and doesn't stick to the glass surface of glass We cannot use Mercury thermometer to measure such a low temperature, because Mercury freezes at -38.8 °C. So in such cases, we have to use alcohol (i.e pure ethanol) in thermometers. The freezing point of pure ethanol is -115 °C With a mercury barometer, you have to use a tube greater than 76 cm in length to obtain a vacuum, because standard atmospheric pressure will support a column of mercury approx. 76 cm tall. If you use water, the tube must be greater than 10 meters tall, due to the difference in density of mercury versus water. This is why mercury is used in. The heavy metal element mercury has fascinated humans since ancient times when it was referred to as quicksilver.It is one of only two elements, the other being bromine, that is liquid at standard room temperature. Once the embodiment of magic, mercury is regarded with much more caution today

Physics Paper 1 Question Paper - 2014 Kisumu West

Why is mercury preferred as a barometric substance over

The length or the mercury column in a certain mercury-in-glass thermometer is 5.00 cm when the thermometer is in contact with water at Its triple point. Consider the length of the mercury column as the thermometric property X and Jet 0 be the.. 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

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The height of the column of mercury in a simple mercury barometer is 76 cm at normal atmospheric pressure. If a liquid of half the density of mercury were used instead, we would need to double the column length for it to have the same weight as mercury In theory, a barometer could be made of any liquid whatsoever. Mercury is chosen, however, for a number of reasons. It is so dense that the column supported by air pressure is of a usable height. A similar barometer made of water, in comparison, would have to be more than 34 feet (100 meters) high Mercury is used as the liquid because of its high density. The common unit used in mercury barometer is mercury millimeter or mmHg. Aneroid Barometer. The aneroid barometer consists of a flexible metal box, which is made from an alloy of copper, and beryllium. This box is known as the aneroid cell Mercury is the favoured liquid for a barometer as it is so heavy. The barometer tube only needs to be a metre long. This makes it a convenient size for everyday use

When measuring liquid pressure, a loop filled with gas or a light fluid can isolate the liquids to prevent them from mixing but this can be unnecessary, for example when mercury is used as the manometer fluid to measure differential pressure of a fluid such as water Q.16 If a drop of water vapour is introduced in a mercury barometer, how will the barometric height change? Answer: Due to pressure exerted by water vapour, the barometric height decreases. Q.17 Why water is not used in barometers? Answer: Water is not used in barometer due to following reasons: (i) It sticks to the walls of the barometer tube Some manufacturers use galinstan, a liquid alloy of gallium, indium, and tin, as a replacement for mercury. The typical fever thermometer contains between 0.5 and 0.3 g (0.28 and 0.17 drachms) of elemental mercury. Swallowing this amount of mercury would pose little danger but the inhaling of the vapour could lead to health problems If a dense liquid such as mercury is used, a manometer may be used to measure higher pressures. Mercury is 13.6 times as dense as water, so the force exerted by its weight is proportionately greater. A pressure which supports a 7.5 mm column of mercury will support a 10.2 cm column of water (Fig. 1.11) Let's take a look at the different vacuum measurement units in use around the world and where the names came from. Fig. 1 Torricelli void. Torricelli, Pascal and the mercury barometer. The understanding that pressures lower than the surrounding atmospheric pressure existed started around the 1640s in Italy

Care must be taken to avoid scattering the mercury or allowing it to roll to a hard-to-reach location. If there is a paper calibration strip inside of the thermometer that includes the words mercury free, then the liquid in the thermometer is not mercury. If you do NOT see the words mercury free, then assume that the liquid is mercury mercury is comparable to adhesive forces between mercury and glass and that's why mercury tends to form drops. Q 10.2 (c) Explain why (c) Surface tension of a liquid is independent of the area of the surface . Answer: Surface tension is the force acting per unit length at the interface of a liquid and another surface

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The Fortin barometer is as shown in Figure 44.6. Mercury is contained in a leather bag at the base of the mercury reservoir, and height, H, of the mercury in the reservoir can be adjusted using the screw at the base of the barometer to depress or relase the leather bag.To measure the atmospheric pressure, the screw is adjusted until the pointer at H is just touching the surface of the mercury. The barometer can also be used as an altimeter, since average atmospheric pressure varies with altitude. Mercury barometers and manometers are so common that units of mm Hg are often quoted for atmospheric pressure and blood pressures. Figure \(\PageIndex{3}\): A mercury barometer measures atmospheric pressure Barometer:Barometer: An instrument for measuring local atmospheric Pressure. A mercury barometer has a glass tube with a height of at least 84 cm, closed at one end, with an open mercury-filled reservoir at the base. The weight of the mercury creates a vacuum in the top of the tube

If a liquid with a lower density than mercury were used in a barometer, the height of the column in the barometer would MET1010. If a liquid with a lower density than mercury were used in a barometer, the height of the column in the barometer would Answer: increase. Learn More : Share this Share on Facebook Tweet on Twitter Plus on Google+. Mercury was used for the field masses not only because it is dense, but because the liquid state made its mass distribution very uniform. We can estimate that the tanks required 405 flasks of mercury, or $115,560 worth at the 1989 price. A curious technical use of mercury was in the production of frozen mercury patterns for making molds for. Benefits Of Mercury. August 30, 2011, Harri Daniel, 1 Comment. Benefits of Mercury. Mercury is an important element that has several uses and advantages for humans. It is used in mining gold, filling teeth and also facilitating experiments in modern physics and chemistry. It also improves our lives when used in other uses that range from electrical switches to fluorescent tubes and household. The diagram show two mercury barometer standing side by side. The right-hand diagram shows a tube bigger diameter, but the diagram is incomplete. There is a vacuum above the mercury in both tubes. Which labelled position on the right-hand tube could show the mercury level in that tube in the last video we learned that the pressure at some depth in a fluid is equal to the density of the fluid times how deep we are in the fluid or kind of how highs the column of fluid above us times gravity let's see if we can use that to solve a fairly typical problem you'll see in your physics class or even on an AP physics test so let's say that I have a bowl a bowl let me draw the bowl. A classic mercury barometer is constructed from a 3-foot glass tube that is open at one end and sealed at the opposite end. The glass tube is filled with liquid mercury and rests upside-down in a reservoir of mercury. As the mercury moves down the glass tube, a vacuum is created

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