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Mercury-in-glass thermometers are generally no longer used in a medical setting in most modern countries, and are being phased out around the world (although they are still useful in scientific applications, such as barometers). Mercury is highly toxic, and does not metabolize out of the body normally.
Mercury has a number of physical properties that make it ideal for measuring pressure changes (heat, such as in a thermometer, creates a change in pressure inside a closed environment). It is a metal, nonmagnetic, very dense, but liquid at room temperature (mercury's freezing point is -39 C, and it boils at 357 C). It does not expand or contract very much with temperature changes, and thus will not burst out of a confined glass tube as long as there is a bit of room inside the tube (usually a vacuum or something like nitrogen) for movement. Also, such expansion and contraction is consistent and predictable.
Mercury is not the only substance that could be used for this purpose, but it is the best fit.
What else can I help you with?
What is the sSensor in Mercury-in-glass thermometer?
The sensor in a mercury-in-glass thermometer is the glass bulb at the base of the thermometer containing the mercury. The temperature is measured by the expansion or contraction of the mercury based on the surrounding temperature, allowing the thermometer to provide a temperature reading.
Why can a mercury thermometer be used only at high temperatures?
A mercury thermometer can go down to -30 deg C
Why do you like Mercury?
i like mercury because it is inside a thermometer
What is the apparatus of thermometer?
A typical thermometer consists of a glass tube filled with a liquid (usually mercury or alcohol) that expands and contracts with changes in temperature. The tube is usually marked with a scale for reading the temperature, and there may be a bulb at the bottom to sense the temperature.
What was the first liquid used in a thermometer?
The first liquid used in a thermometer was likely alcohol, specifically ethanol. Alcohol has a low freezing point and a wide range of expansion when heated, making it suitable for use in early thermometers.
What is a mercury filled glass tube that measures air temperature called?
A mercury-filled glass tube that measures air temperature is called a mercury thermometer.
What type of thermometer is widely used in science classrooms?
Frequently thermometers filled with an alcohol; but also thermometers with mercury, with thermoresistance, thermocouples, etc.
Is mercury used in food thermometer?
In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Mercury thermometers can be used to determine body, liquid, and vapor temperature.
What is the construction of mercury thermometer?
A typical mercury thermometer consists of a glass tube with a bulb at one end filled with mercury. As the temperature changes, the mercury expands or contracts, causing it to rise or fall in the tube. The temperature is then read based on the level of the mercury within the graduated scale on the tube.
What are the four kinds of thermomether?
1. Alcohol or spirit thermometer 2. Mercury thermometer 3. Liquid crystal thermometer 4. Quartz thermometer 5. Reversing thermometer 6. Resistance thermometer
What color is the Mercury in a Mercury thermometer?
Mercury in a Mercury thermometer is typically silver in color.
What is thermometer made up of?
In this answer I m referring to the normal thermometers. Not the electronic thermometers. There is a very very thin capillary tube incide the thermometer which is filled with mercury and it has a bulb aT one end. When it touches a surface, the mercury expands, rises in the capillary and the temperature is shown.
What is liquid-in-glass thermometer?
A liquid-in-glass thermometer is a type of thermometer that consists of a glass tube filled with a liquid, typically mercury or alcohol, which expands or contracts with changes in temperature. The level of the liquid in the tube corresponds to the temperature, allowing for temperature measurement.
What is the base of a thermometer called?
The base of a thermometer is called the bulb, which is typically filled with a fluid like mercury or alcohol. This is where the temperature is measured by the expansion or contraction of the fluid in response to changes in temperature.
Can the mercury in a thermometer hurt you?
Yes, if a mercury thermometer breaks, the mercury can vaporize and be inhaled, which can be harmful to your health. It is important to handle and dispose of a broken mercury thermometer properly to avoid exposure to mercury.
What is Mercury thermometer use to measure?
A mercury thermometer is used to measure temperature.
This instrument is often filled with mercury colored water or alcohol?
The instrument you are referring to is likely a thermometer. Thermometers are commonly filled with either colored alcohol or mercury to measure temperature changes based on the expansion or contraction of the liquid inside.
