When heat is applied to a substance/material or steel in our case, a series of changes will occur, one of which is Expansion.
Hence the hole will expand from 1cm to a diameter that is greater.
Thermal expansion refers to the expansion or contraction of the dimensions of the solid, liquid or gas when their temperature is changed.
Types of Expansion
- Linear expansion
- Areal expansion and
- Volumetric volume.
Learn more about expansion here:
https://brainly.com/question/1166774
