A Celsius thermometer will measure the boiling point of water at 100° and its freezing point at 0°; a Fahrenheit thermometer will measure the same events at 212° for the boiling point of water and 32° as its freezing point.
Which thermometer is used for boiling water?
Hence, the answer is Laboratory thermometer.
What is the measure of a boiling water?
The boiling point of a liquid varies according to the applied pressure; the normal boiling point is the temperature at which the vapour pressure is equal to the standard sea-level atmospheric pressure (760 mm [29.92 inches] of mercury). At sea level, water boils at 100° C (212° F).
Can you put thermometer in boiling water?
In a deep pot, bring distilled water to a rolling boil. Dip the thermometer stem two inches into the boiling water without touching the bottom or sides of the pot. Wait for 30 seconds and the thermometer should read 212°F.
Why is mercury used in thermometer?
Mercury is the only one in liquid state at room temperature. It’s used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it’s used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures.
What are the 4 types of thermometer?
There are different types, but not all thermometers are right for your child.
- Digital thermometers.
- Ear (or tympanic) thermometers.
- Infared thermometers.
- Strip-type thermometers.
- Mercury thermometers.
What is the boiling point of mercury?
Ethanol has low freezing point. Hence, it is used in thermometers.
Is alcohol used in thermometer?
Ethanol-filled thermometers are used in preference to mercury for meteorological measurements of minimum temperatures and can be used down to −70 °C (−94 °F). The physical limitation of the ability of a thermometer to measure low temperature is the freezing point of the liquid used.
What is digital thermometer used for?
Digital thermometers work by using heat sensors that determine body temperature. They can be used to take temperature readings in the mouth, rectum, or armpit. When assessing digital thermometer readings, keep in mind that armpit (axillary) temperature runs about ½ to 1°F (0.6°C) cooler than oral readings.
Which thermometer is best mercury or digital?
A digital thermometer is simple and convenient to use.
- It gives faster results than a mercury thermometer which usually takes time to heat up.
- It is safer as it doesn’t contain any harmful chemicals.
- It gives more precise results than a mercury thermometer.
What are 3 kinds of thermometers and their uses?
A thermometer is a device that is used to measure the temperature of a body. Common types of thermometers are Medical thermometers, Infrared thermometers, Mercury thermometers, thermocouple thermometers, laboratory thermometers, Bimetallic strip thermometers, Pyrometers, etc.
Why mercury is called metal?
Mercury was named after the Roman god. Its chemical symbol (Hg) comes from hydrargyrum from the Greek word hydrargyros meaning ‘water’ and ‘silver’. Mercury is classified as a “Transition Metal” as it is ductile, malleable, and is able to conduct heat and electricity.
Who invented mercury?
It is not known exactly when the planet was first discovered – although it was first observed through telescopes in the seventeenth century by astronomers Galileo Galilei and Thomas Harriot.
Why is clinical thermometer used?
Clinical thermometers are meant for clinical purposes. It is developed for measuring the human body temperature. It is a long narrow glass tube with a bulb containing mercury at the end. The normal human body temperature is 37˚C; which can fluctuate between the ranges 35˚C to 42˚C.
Why is mercury used?
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.
What is a mercury 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 use of mercury and alcohol thermometer?
Alcohol Thermometers: Alcohol thermometer is suitable for measurement of low temperatures. Mercury Thermometers: Mercury thermometer is suitable for measurement of high temperatures.
What is bimetallic thermometer?
Bimetal thermometers are thermometers based on the functional principle that metals expand differently depending on the change in temperature. A bimetal thermometer always consists of two different metal strips that have a different thermal expansion coefficient.
Are mercury thermometers accurate?
Scale Divisions and Accuracy Limits
For thermometers that have a high range of 260° C, accuracy below 100° C is ± 1°-2° C for both mercury and non-mercury thermometers. Above 100° C mercury thermometers have an accuracy range of ± 1.5° C, while non-mercury have an accuracy limit of ± 3° C.
Which liquids are used in thermometers?
The most commonly used liquid is mercury. The range of mercury thermometer is 390C−3570C.
What is the best type of thermometer?
Digital thermometers are the most accurate way to measure body temperature. There are many types, including oral, rectal, and forehead, plus many that are multifunctional.
How are different thermometers used?
How to use a digital thermometer?
- Oral: For this method, the thermometer is placed under the tongue.
- Rectal: For this method, the thermometer is inserted gently into the rectum.
- Axillary: For this method, the thermometer is placed in the armpit for young children or adults whose temperature can’t safely be done orally.
What is digital thermometer Class 7?
Digital thermometers are an advance to the existing clinical thermometers; Due to high toxicity of the Mercury present in clinical thermometers and difficulty in its disposal in cases when the thermometer breaks digital thermometers are manufactured that can measure the accurate temperature without the use of mercury.
Which is the best digital thermometer in India?
Price Summary of 10 Best Digital Thermometer Options in India
| S No. | Product Name | Price |
|---|---|---|
| 1 | AmbiTech PHX-01 Digital Thermometer with One Touch Operating For Child and Adult Oral or Underarm Use (Made in India) | Rs. 220 |
| 2 | Medtech Digital Thermometer | Rs. 285 |
| 3 | MCP Digital Thermometer F Scale | Rs. 250 |
Why alcohol thermometer Cannot measure the temperature of boiling water?
The temperature of boiling water is 100℃ but the maximum limit that an alcohol thermometer can measure is 80℃. So, an alcohol thermometer cannot measure the temperature of boiling water as it has the limit to measures up to 80℃.
Which type of thermometer is used to measure the temperature of a place?
Liquid thermometers often include both Celsius and Fahrenheit temperature scales, which are displayed on either side of the tube. A maximum thermometer is a familiar type of liquid thermometer. In a maximum thermometer, the liquid is pushed up the glass tube, but cannot fall easily when the temperature lowers.
What is a gas thermometer used for?
a device for measuring temperature by observing the change in either pressure or volume of an enclosed gas.
What are the 7 types of thermometer?
7 Types of Thermometers and to what Degree You Should Trust Them
- Forehead strips.
- Wearable thermometers.
- Pacifier thermometers.
- Ear thermometers (tympanic)
- Forehead thermometers (temporal)
- Digital thermometers.
- Non-contact Infrared Thermometers.
- Bonus: Mom’s hand or lips.
What Colour is mercury?
What does Mercury look like? Here you can see that Mercury is a light grey color.
What is the symbol of the gold?
At room temperature, exposed elemental mercury can evaporate to become an invisible, odorless toxic vapor. If heated, it is a colorless, odorless gas.
Can you touch mercury?
If you touch it, a small amount may pass through your skin, but not usually enough to harm you. Mercury is most harmful when you breathe in the vapors that are released when a container is open or a spill occurs. Pregnant women, infants and young children are particularly sensitive to the harmful effects of mercury.
What is mercury in fish?
Methylmercury in fish mainly comes from mercury in ocean sediment that is transformed into methylmercury by microorganisms. This organic form of mercury is absorbed by the tissues of fish through their gills as they swim and through their digestive tracts as they feed.
Is carbon a metal?
carbon (C), nonmetallic chemical element in Group 14 (IVa) of the periodic table.
Which thermometer does not use mercury?
Spirit thermometers use a non-toxic alcohol instead of mercury to register the temperature. Like liquid mercury, the alcohol expands in volume as it gets warmer, causing the liquid to move up the thin tube inside the glass thermometer. Digital thermometers contain a device called a thermoresistor.
Why do we use mercury in thermometer can water be used instead of mercury?
Solution. We use mercury in thermometers as they remain in liquid form even with a change of temperature in it. A small change in the temperature causes change in volume of a liquid. Water cannot be used as a thermometric liquid, because it is not helpful to measure below 0°C and above 100°C.
What type of thermometer is used by Doctor?
The thermometer used by doctors and nurses to measure the temperature of human body is clinical thermometer ( medical thermometer) ranging from 35-42 degree Celsius.
What is mercury’s name?
The Romans knew of seven bright objects in the sky: the Sun, the Moon, and the five brightest planets. They named them after their most important gods. Because Mercury was the fastest planet as it moved around the Sun, it was named after the Roman messenger god Mercury.
What are 3 uses for mercury?
Although many liquids could be used in pressure measuring devices, mercury is used because its high density requires less space. It is also a good conductor of electricity, so it is a useful component of electrical switches. Mercury is also used in dental fillings, paints, soaps, batteries, and fluorescent lighting.
Why is mercury a liquid?
In short, electrons of mercury (Hg) are too near the nucleus, and too fast or too unpredictable to move that they cannot be contained in a strong bond, i.e. solids. This concept of weak bonding makes a good explanation of mercury, being a liquid at room temperature.
Why mercury is used in sphygmomanometer?
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.
When can glass thermometers be used?
For David
| Question | Answer |
|---|---|
| when can glass thermometers be used | when enclosed in a shatterproof casing |
| why should food temp be taken in 2 places in the food? | food temp may vary |
| Which use by date is used if 2 exist in the same meal | the soonest date IE. shrimp= 4/8/14 and scallops= 4/10/14; meal will have a use by date of 4/8/14 |
When was mercury used in thermometers?
The more modern thermometer was invented in 1709 by Daniel Fahrenheit. It was an enclosed glass tube that had a numerical scale, called the Fahrenheit scale. The early version of this thermometer contained alcohol and in 1714 Fahrenheit developed a mercury thermometer using the same scale.
Which boils faster alcohol or mercury?
The main advantage of mercury thermometer over alcohol thermometer is that mercury has greater boiling point than alcohol.
What is the thermocouple thermometer?
thermocouple, also called thermal junction, thermoelectric thermometer, or thermel, a temperature-measuring device consisting of two wires of different metals joined at each end. One junction is placed where the temperature is to be measured, and the other is kept at a constant lower temperature.
What kind of liquid is in a Galileo thermometer?
What is the clear liquid in a Galileo thermometer? The clear liquid in a Galileo thermometer is ethanol, a colorless volatile liquid with very little odor. Although its density is less than water, it varies depending on the temperature, even more so than water.
Where are bimetal thermometers used?
Bimetallic thermometers are used in residential devices like air conditioners, ovens, and industrial devices like heaters, hot wires, refineries, etc. They are a simple, durable, and cost-efficient way of temperature measurement.
What is a thermocouple used for?
Thermocouples are used in applications that range from home appliances to industrial processes, to electric power generation, to furnace monitoring and control, to food and beverage processing, to automotive sensors, to aircraft engines, to rockets, satellites and spacecraft.
Where are resistance thermometers used?
Due to their accuracy and robustness, they are extensively used as in-line thermometers in the food industry. Within a wide range of temperatures the resistance of metals increases linearly with temperature. The measuring element is usually made of platinum.
What is the price of mercury thermometer?
Mercury Thermometer at Rs 75/piece | Clinical Mercury Thermometer | ID: 11540278248.
What does liquid in glass thermometer measure?
Liquid-in-glass thermometers measure the thermal expansion of a liquid, which is placed in a solid container, on a length scale. The mercury thermometer is one example of liquid thermometers. Alcohol is also used with this type of instrument. The temperature range is −80 to +330 °C depending on the liquid.
What is liquid in glass thermometer used for?
The liquid in glass thermometer, is the most commonly used device to measure temperature and it is inexpensive to make and easy to use. The liquid in glass thermometer has a glass bulb attached to a sealed glass tube (also called the stem or capillary tube).
Do thermometers still use mercury?
The oldest thermometers used are mercury in glass. Newer thermometers include non-mercury liquids in glass and digital and electronic devices that use sensors to measure temperature. Thermometers that check body temperature in the ear, across the forehead, or have a digital display do not contain mercury.
What are 3 types of thermometers?
There are different types, but not all thermometers are right for your child.
- Digital thermometers.
- Ear (or tympanic) thermometers.
- Infared thermometers.
- Strip-type thermometers.
- Mercury thermometers.
What is digital thermometer used for?
Digital thermometers work by using heat sensors that determine body temperature. They can be used to take temperature readings in the mouth, rectum, or armpit. When assessing digital thermometer readings, keep in mind that armpit (axillary) temperature runs about ½ to 1°F (0.6°C) cooler than oral readings.
Which thermometer is best for baby?
The best baby thermometers you can buy in 2022
- Braun Thermoscan 7 (IRT6520): The best baby thermometer.
- Braun No Touch and Touch Thermometer with Age Precision: The best thermometer for all ages.
- Tommee Tippee Digital Ear Thermometer: The best in-ear baby thermometer.