Is thermometer a good conductor of heat? Most metals are good conductors of heat and they are solids at room temperature. Mercury is a good conductor of heat. It is used in thermometers because it has a high coefficient of expansion. It also has a high boiling point which makes it very suitable to measure higher temperatures.
Is a thermometer a conductor or insulator?
The thermos acts as an insulator, keeping heat out. As you may have guessed by now, insulators make poor conductors.
What is bad conductor of heat?
Metals and stone are considered good conductors since they can speedily transfer heat, whereas materials like wood, paper, air, and cloth are poor conductors of heat. These include copper (92), iron (11), water (0.12), and wood (0.03).
Is clinical thermometer a bad conductor of heat?
it is a bad conductor of heat.
Which is the good conductor of heat?
Metals like copper and aluminium have the highest thermal conductivity while steel and bronze have the lowest. As copper is an excellent conductor of heat, it is good for heat exchanger also. Gold, Silver, Iron etc are also some examples of good heat conductors as well as electrical conductors.
Related guide for Is Thermometer A Good Conductor Of Heat?
Why is mercury used in thermometer if it is a bad conductor of heat?
Because mercury has low thermal capacity, high heat conductivity, inertness in relation to a glass capillary tube and a high boiling point, it is an ideal thermometric liquid except for its relatively high melting point.
Why mercury is used in thermometer as it is poor conductor of heat?
Why is mercury used in thermometers despite being the poorest conductor of heat? 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.
Which thermometer has a kink?
Clinical thermometer is used to check our body's temperature. It is a special type of liquid in glass thermometers. Kink, it is used to break the mercury in the glass tube and stores the reading of the thermometer by its contraction.
What are 4 bad conductors?
Some other examples of poor conductors of electricity are mica, paper, wood, glass, rubber, Teflon, etc. Some examples of poor conductors of heat are air, lead, etc. Hope this helps.
What are bad conductors?
Non-metals are generally bad conductors or insulators. The poor conductor has very few numbers of a free electron and will have high resistance to the flow of electric current. Materials like rubber, glass, wood, etc are bad conductors.
What are bad conductors of heat give two examples?
The subtances that conduct heat easily through them are called good conductors of heat. for EX-copper, iron, metal etc. and the substances which doesn't allow heat to pass through them are called bad conducters of heat. EX-wood, rubber, plastic etc.
How mercury can be poor conductor of heat?
Mercury is a poor conductor of heat, but a fair conductor of electricity. Mercury has a unique electron configuration which strongly resists removal of an electron, making it behave similarly to noble gas elements. As a result, mercury forms weak bonds and is a liquid at room temperature.
Which metal is poor conductor of electricity?
Tungsten and Bismuth are metals which are poor conductors of electricity. There are many, but some include Aluminum, Bismuth, Gallium, Indium, Lead, Thallium, Tin, Ununhexium, Ununpentium, Ununquadium, and Ununtrium.
Is oxygen a bad conductor of heat?
Oxygen is a colorless, odorless, tasteless gas; it is the first member of Group 16 of the periodic table. It is denser than air and only slightly soluble in water. A poor conductor of heat and electricity, oxygen supports combustion but does not burn.
Is gold a bad conductor of heat?
Metals are considered as good conductors of heat whereas the non-metals are considered as the poor conductor of heat. Complete solution: Gold, mercury, lead and alloys all are good conductors of heat. But compared to other metals, gold is a good conductor of heat.
Is gold conductor of heat?
Gold is used as a contact metal in the electronics industry as it is a good conductor of both electricity and heat.
What are 5 good conductors of heat?
Some materials allow the heat to flow through them and they are known as good conductors of heat or heat conductors such as iron, aluminum, copper, silver, brass, lead and stainless steel.
Can thermometers be wrong?
No thermometer will provide accurate results if it's used incorrectly. Never use a thermometer on a person that is meant for another purpose, such as a laboratory or meat thermometer. These won't provide accurate readings.
What do thermometers use instead of mercury?
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 do you do if you break a mercury thermometer?
Slowly and carefully squeeze mercury onto a damp paper towel. Alternatively, use two pieces of cardboard paper to roll the mercury beads onto the paper towel or into the bag. Place the paper towel in a zip locking bag and secure. Make sure to label the bag as directed by your local health or fire department.
Why mercury is good conductor of heat?
We know that mercury has a large value of the coefficient of thermal expansion. Hence, even the smallest change in temperature is evident in the shape of the mercury container. All these factors make mercury a good conductor of heat and this is why it has a large application spectrum especially in measuring devices.
Why is mercury a poor conductor of electricity?
Heat energy is conducted by transferring energy of atoms vibrating at high level. Since high density of mercury, there is no enough room for vibrating mercury atoms. So it can't be heated easily. So it's a poor conductor of electricity.
Which is the poorest conductor of heat among lead and mercury?
The correct answer is Lead. Among metals: Copper & Zinc are good conductors. Mercury metal is a poor conductor while Lead is the poorest conductor.
Is mercury best conductor of heat?
Since mercury is 13+ times as dense as water, a given volume of mercury would carry about 4.4 times as much heat, so mercury is best conductor of heat among the given options. It is the only metal that is liquid at standard conditions for temperature and pressure.
Is mercury a good insulator?
Any material that does not allow heat or any electricity to go through it is known as an insulator. Here in the question copper and mercury both are good conductors. They allow heat and current to go through them and they are also metals. Iron is also a good conductor.
Why is mercury and alcohol used in thermometers instead of water?
There is a technical reason for using mercury in clinical thermometers. Mercury has a greater coefficient of thermal expansion than alcohol. This means a column of mercury will expand and rise more than a column of alcohol for the same temperature change. As a result, you can get finer readings with mercury.
Does a thermometer contain mercury?
In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. Mercury thermometers can be used to determine body, liquid, and vapor temperature. Mercury thermometers are used in households, laboratory experiments, and industrial applications.
Is the body temperature of every healthy person 37 C?
The average normal body temperature is generally accepted as 98.6°F (37°C). Some studies have shown that the "normal" body temperature can have a wide range, from 97°F (36.1°C) to 99°F (37.2°C).
What is a kink Class 7?
The kink is to prevent back flow of mercury into the thermometer bulb when the thermometer is removed from the mouth of the patient. The kink prevents the mercury level from falling so that we can read the temperature of the patient carefully.
What is meant by poor conductor of heat and good conductor of heat with examples?
Good conductors - "The substances through which heat is easily conducted are called good conductors of heat". Example - Copper, Iron. Bad conductors - "The substances through which heat is not conducted easily are called bad conductors of heat or poor conductors of heat". Example - Wood, Cloth.
Is cork a bad conductor of heat?
In fact, cork is a very good thermal insulator. The reason has to do with the composition of cork. Cork is made up of countless tiny cells that are filled with air. That's one of the reasons why cork is one of the most effective heat insulators around.
What are the bad conductors of heat with examples?
Heat insulators like wood, glass, paper, cloth, rubber, oils, plastic, cork, vacuum, and particularly air gases. Therefore, wood is a bad conductor of heat.
What are good and bad conductors?
Good conductor- A conductor is a substance that easily allows electricity to move through it. Silver, copper, and other metals are excellent conductors. Poor conductor- Materials that do not allow electricity to pass through them are known as bad conductors. Rubber, glass, and wood, for example, are poor conductors.
What is good and bad conductors of heat?
Materials that allow heat to pass through them easily are called good conductors of heat. Materials that do not conduct heat as easily and quickly as metals do are bad conductors. Take three rods, one each of Aluminium, Copper and Iron. Wax melts faster on three rods where materials have larger Thermal conductivity.
Which of the following materials is the bad conductor of heat?
The correct answer is Wood. Materials that are poor conductors of heat are called insulators. Wood is a poor conductor of heat (as well as other forms of energy) because it is covalently bound as a compound.
Why is lead a bad conductor of heat?
Lead is a poor conductor of heat because it readily reacts with the atmosphere to form lead oxide, where we know metal oxides are poor conductors of heat and electricity as well.