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3 Cards in this Set
- Front
- Back
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Why do they use black tubes for solar geyser |
Black tubes absorb the radiant heat from the sun and conduct water that's inside tubes |
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Why do insulating materials contain small holes |
The air trapped inside them is a very poor conducted of heat since it is trapped in small pockets there can be no convection. |
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Why are carpets good insulators and not cement |
Concrete floor is much better conducter of heat than the carpet that has trapped air pockets |
