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Many insulating materials contain spaces filled with air because air is what type of material?
Wiki User
∙ 13y ago
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.
Wiki User
∙ 14y ago
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