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Ex.: expanded polystyrene, asbestos, wool, aluminium oxide powder, etc.
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What is organic insulating materials?
Depends upon what you wish to insulate against. Heat loss, high temperatures, electrical, ... . For electrical, plastics and rubber are common. For heat loss, foam polystyrene, or cotton cloth. For high temperatures, your choices are limited, for organic materials don't perform well here.
What factors affect the process of evaporation and condensation?
Heat flow (total heat and insulating factors).
Which of the following crystals would be the best at insulating heat Fe Cu C or Na?
Non-metals such as carbon are insulators of heat.
What materials change by heat?
Many materials such as plastic melt and some materials burn such as wood
When is it useful not useful to heat materials?
If you are stuck with metal for example you can heat it
What are examples of heat keeping materials?
Newspaper and styrafoam.
What is insulating material used for?
insulating materials have low thermal/electrical conductivity values and hence can be used in applications where resistance to heat or resistance to the passage of electrical current is required.
Are all thermally conducting materials also electrically conducting?
no. for example ceramic insulating heat sink wafers conduct heat very well from an electronic component to a metal heatsink while insulating the component electrically from the heatsink.
What has the author E A Allcut written?
E. A. Allcut has written: 'An analysis of heat transfer through thermal insulating materials'
How do insulating materials save energy?
Insulating materials prevent excess heat and water and energy from seeping out. When these forms of energy escape, they are wasted. By preventing them from escaping, less has to be used as none is leaving, so you ultimately have to use less of a resource and can thus conserve it.
What factors affect the rate of heat transfer by conduction?
The thermal efficiency (insulation U factor) of the material through which the heat is conducted, and the number of films (each surface to surface contact of similar or dissimilar materials is a film) through which the heat passes are what affect rates of transfer of heat by conduction. Metals as opposed to non metallic elements have a higher rate of heat transfer. Without citing formulas: Film insulating is the most effective means of insulating an object from heat. Layers of thin materials can be better insulators than thick materials that are not layered. If the layers are dissimilar materials from one film to the next the insulation is even more effective. Air is one of the most effective insulating materials if it is trapped between layers to prevent motion from convection. *When factoring in radiant or convective heat transfers to conductive heat transfer the surface between the heat source and the insulator is counted as the first film.
What are some heat insulators?
Some heat insulators are fiberglass, polyurethane foam, and polystyrene. Two other thermal insulators used as insulating materials in building construction are mineral wool and cellular glass.
What is organic insulating materials?
Depends upon what you wish to insulate against. Heat loss, high temperatures, electrical, ... . For electrical, plastics and rubber are common. For heat loss, foam polystyrene, or cotton cloth. For high temperatures, your choices are limited, for organic materials don't perform well here.
How does loft insulation save heat energy?
Heat always flows from a warm region to a cooler region. An uninsulated house loses heat at a faster rate during cold climates than an insulated one. Insulating a loft reduces the amount of heat loss from the roof by means of installing insulating materials such as fiberglass matting, which reduce the U-value of the loft. The U-value provides an indication of how much heat loss occurs from an area, the higher the U-value, the greater the heat loss.
Is a styrofoam a good conducter of heat or a bad conductor of heat?
It is a bad conductor of heat, that is why it is used as an insulating material.
Give some examples of materials that slow heat transfer?
Concrete Glass WaterTeflon WoodPolystyreneGlass Wool insulation StyrofoamAir Argon
Many insulating materials contain spaces filled with air because air is what type of material?
Some insulating materials contain a small air space because air itself is a good insulator. Because their are few molecules in air compared to the same volume of solid, it takes longer for the heat to be transferred through the layer of air. Thus, air is a cheap and lite insulator.
