Concept explainers
When a block with a hole in it is heated, why doesn’t the material around the hole expand into the hole and make it smaller? Explain this behavior by looking at the forces operating at the molecular level.
The reason for which, while heating a block with a hole in it, the material around the hole does not expand into the hole and make it smaller.
Answer to Problem 1CQ
The expansion of materials upon heating is due to the increase in molecular separations which take place uniformly and hence the expansion of the solid material as well as the hole is identical so that the material around the hole does not expand into the hole and make it smaller.
Explanation of Solution
Upon heating all the materials expands. This expansion is due to the increase in the average molecular separation in the material due to the gain of heat energy. The increase in the average separation between the atoms or molecules take place uniformly in all directions.
The expansion of a material block with a hole in it is identical to that of a solid block. The hole in the block expands just like the solid piece of the material. Therefore, while heating a block with a hole in it, the material around the hole does not expand into the hole and make it smaller.
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