38. Glass wool is a good insulator because it has
Answers
Answer:
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Explanation:
glass wool has a number of properties which should make it desirable as a heat insulator . It is light , is prooof against fire and dampness , chemicals , rodents ,etc.., will stand high temperatures , will not decay our deteriorate with use and has low specific heat.
Glass wool is a good insulator because it has no free electrons and has porous body.
Explanation:
1. There are some materials which do not allow electric current to flow through it. These materials are called insulators.
2. In insulators, there are no free electrons present. Free electrons are necessary so that electric current is produced by their movement. Glass wool do not have free electrons in it and hence cannot conduct electric current.
3. Glass wool is formed by winding glass fibres together that are flexible into a wool like texture.
4. Apart from being a good insulator, these material also has some other properties like- corrosion resistant, low thermal conductivity, low expansion property, etc.
5. The property of insulation of glass wool can be used in filling up to voids or empty holes of roofs as well as walls.
6. Glass wool is also fireproof and can withstand high temperature and does not get decayed.
7. For the insulation of hot as well as cold pipe, we can use glass wool.
8. Some other examples of insulators includes: wood, plastic, rubber, paper, etc.
Know More:
Classify the following as conductors and insulators:Eraser, coin, glass, pencil lead, needle, key, iron nail, plastic scale, wood, vinegar, dry air.
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Classify the following solutions as good and poor conductors of electricity. lemon juice, distilled water, milk, honey, tap water, kerosene oil, vinegar, vegetable oil.
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