It is well known that a potato bakes faster if a large nail is stuck through it. Why? Does an aluminum nail work better than a steel one? Why or why not? (?Note?: Don’t try this in a microwave oven!) There is also a gadget on the market to hasten the roasting of meat; it consists of a hollow metal tube containing a wick and some water. This is claimed to work much better than a solid metal rod. How does it work?
Solution 24DQ Step 1: Aluminium has a much higher thermal conductivity than any of the steels,therefore an aluminium nail will move heat from the oven into the potato much faster than a steel nail.