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3 answers

water. rocks.

2007-01-31 14:45:54 · answer #1 · answered by the bertis 2 · 0 1

Fiberglass insulation is an excellent material for slowing heat transfer. All the air pockets within the insulation retard the radiation of heat, and the fiberglass itself is a poor heat conductor, so it retards the condution of the heat as well.

2007-01-31 22:48:48 · answer #2 · answered by Jared Z 3 · 1 0

Ceramics, asbestos, fiberglass, or any of a number of insulating products. The best insulator is actually no material at all. A vacuum.

2007-01-31 22:48:35 · answer #3 · answered by mazaker2000 3 · 0 1

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