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What of the following is an example of a thermal insulator A still air B gold C zinc D lead?
Wiki User
∙ 8y ago
Still air.
Wiki User
∙ 8y ago
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Is Water an example of thermal conductor or insulator?
It is a conductor. While air has a thermal conductivity of 0.025 W/M-K, water has 0.6 W/M-K. Air, with this thermal conductivity, is considered one of the best isolators - practically, every isolation material (for construction purposes) is made up out of little cells full with air, so most of it's volume is actually air. Water is about 24 times more conductive. Which is still pretty bad compared to the thermal conductivity of aluminum, which is 237 W/M-K.
Is air a poor conductor of thermal energy?
It depends what you are comparing it to, if for instance you compare it to a vaccuum then it is an infinitely better conductor. Compared to copper however it is very poor, because obviously air is a mixture of various gasses and gasses are mostly empty space; because transferal of heat is through one particle passing on energy to another through vibrations it stands to reason that the less particles you have in a set volume the less efficiently it will transfer heat.
What are the example of an insulators?
The best example of an insulator is wood.answ2. It depends upon which things you wish to insulate.For electrical, rubber, ceramic and plastic are common,For heat, air is about the best insulator, so a substance that entraps a lot of still air will be good. Examples would be fibreglass, asbestos, foam plastic, wool, etc.For sound insulation, massive smooth materials are the thing, such as concrete, gypsum wallboard, and similar.
Is denim a good insulator?
dont know yet.. im still working on the expirement.. i'll tell u when its finish
What can't heat pass through?
A vacuum is the best insulator, and prevents conduction and convection. Radiation is still possible though.
Are bird feathers good insulators?
The birds think so, even the Penguins! Down is a very good insulator, for it entraps lots of air compared to its own weight. With any thermal insulator, what you are buying is still air, because for practical purposes, air is the best insulator.
Is Water an example of thermal conductor or insulator?
It is a conductor. While air has a thermal conductivity of 0.025 W/M-K, water has 0.6 W/M-K. Air, with this thermal conductivity, is considered one of the best isolators - practically, every isolation material (for construction purposes) is made up out of little cells full with air, so most of it's volume is actually air. Water is about 24 times more conductive. Which is still pretty bad compared to the thermal conductivity of aluminum, which is 237 W/M-K.
Why is it good to wrap an ice cream container full of ice cream with newspaper to stop it melting?
Still air is an excellent thermal insulator, and the layers of newspaper are poor conductors, thus the ice cream carton will keep about as cool as you can get without using extra refrigeration.
Is air a poor conductor of thermal energy?
It depends what you are comparing it to, if for instance you compare it to a vaccuum then it is an infinitely better conductor. Compared to copper however it is very poor, because obviously air is a mixture of various gasses and gasses are mostly empty space; because transferal of heat is through one particle passing on energy to another through vibrations it stands to reason that the less particles you have in a set volume the less efficiently it will transfer heat.
Would a toaster still be thermal energy if it was not pluged in?
no
What are the example of an insulators?
The best example of an insulator is wood.answ2. It depends upon which things you wish to insulate.For electrical, rubber, ceramic and plastic are common,For heat, air is about the best insulator, so a substance that entraps a lot of still air will be good. Examples would be fibreglass, asbestos, foam plastic, wool, etc.For sound insulation, massive smooth materials are the thing, such as concrete, gypsum wallboard, and similar.
Is solar energy the same as solar thermal?
No. Solar power is not the same as thermal energy. Thermal energy is the random kinetic motion of microscopic molecule. Solar power on the other hand is derived from electromagnetic waves. For example: lets take a plant. If you put a plant in a dark room and heat the plant, the plant will still die even though it is supplied with thermal energy. However if you now add light(of specific wavelengths) the plant will thrive. So the plant can discern the difference between thermal energy and solar energy. Hope that helps
How do you use thermal conductivity in a sentence?
Thermal conductivity involves the movement of energy while the as a whole is still. Gases are said to have low thermal conductivity, as they transfer heat poorly. Metals have much better thermal conductivity, as they will heat up and cool down relatively quickly.
What is a poor conductor of heat?
A poor conductor of heat is usually refereed as an insulator, the reason being is because Metal conceives over thousands of particles, these particles then vibrate between one another causing it to spread dramatically, this process speeds up the heating, enabling it to be hotter then usual. However, None-Metals are called "Insulators" Insulator meaning the particles are either too close to each other or spread out further, a wooden spoon can be described to be a insulator because it doesn't conduct with heat.
Is glass or metal a better conductor?
Glass has a higher conductivity than thin plastic but,it is still lower than metal so metal may be a better conductor
What can't heat pass through?
A vacuum is the best insulator, and prevents conduction and convection. Radiation is still possible though.
Is denim a good insulator?
dont know yet.. im still working on the expirement.. i'll tell u when its finish
