Mercury Used In Thermometers Because Of Its
The increase of mercury is steady or linear to the changes of the heat except for actual high temperature.
Mercury used in thermometers because of its. Mercury thermometers are reasonably priced durable and perfect. Liquid in glass thermometers are the cheapest kind of thermometer and are also easy to use. The volume of mercury changes slightly with temperature. The volume of mercury in the tube is much less than the volume in the bulb.
Mercury thermometers can be used to determine body liquid and vapor temperature. It is widely used in the construction of barometers and thermometers. Still despite their small flaws mercury thermometers are regarded to be one of the most accurate thermometers available. Common household uses of mercury thermometers include fever thermometers and oven candy and meat thermometers.
Mercury boils at 357 c so it can therefore be used to measure higher temperatures. These new mercury thallium thermometers can now measure temperatures as low as 62ᵒc. However it freezes at 39 celsius so mercury cannot be used below this temperature. Mercury has a boiling point which makes it suitable to measure higher temperatures.
Mercury thermometers were an integral part of every household across the globe for several decades until the new digital and laser thermometers came in. The small change in volume drives the narrow mercury column. Mercury is easily the best liquid to use for 5 important reasons. They will always be associated with a childhood memory for many as a magical liquid inside a glass bottle that helped us make sure that we took a day off from school.
Mercury is used in thermometers because of its special properties. It can measure a wide range of temperatures from 40 to 356 c and up to 570 c under pressure in liquid state. Mercury is the only metal that is in liquid state at room temperature. The mercury in glass or mercury thermometer was invented by physicist daniel gabriel fahrenheit in amsterdam 1714.
The barometer was invented by evangelista torricelli in 1643 and the thermometer by gabriel fahrenheit in the year 1714. It consists of a bulb containing mercury attached to a glass tube of narrow diameter. 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. It is very reflective so it s easy to see and to read accurately.
Household uses of mercury thermometers. Although mercury thermometers pose many benefits to users they also have their drawbacks. The most peculiar characteristics about these measuring instruments were that both used mercury as the liquid because of its less linear expansivity. Mercury is a neurotoxin and if you are exposed to it outside of its typical glass thermometer tube it can cause you to go deaf experience tremors memory loss and partial blindness among other awful permanent side effects.
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