Posted by **StressedStudent** on Thursday, November 29, 2012 at 3:57am.

A sealed box containing a chunk of ice is made of 2cm thick wood, a good thermal insulator. The air outside the box is warm. It takes the ice one hour to melt. If I had put 2cm of aluminum (a good thermal conductor) around the outside of the box, in contact with the wood, the ice would have melted:

Faster

Slower

At the same rate

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