The length of an iron rod is found to be smaller on a hot summer day than on a cold winter day as measuredby the same aluminium scale. Is it correct to conclude that iron shrinks on heating? (alpha of iron =12xx10^(-6)//""^(0)C and alpha of aluminium =24xx10^(-6)//""^(0)C).

The length of an iron rod is found to be smaller on a hot summer day t

1.	The length of an iron rod is found to be smaller on a hot summer day than on a cold winter day as measuredby the same aluminium scale. Is it correct to conclude that iron shrinks on heating? (alpha of iron =12xx10^(-6)//""^(0)C and alpha of aluminium =24xx10^(-6)//""^(0)C).
Answer» Solution :No, because during WINTER IRON CONTRACTS LESS than aluminium. So, the iron rod appears LONGER during winter.