What is expansion solids

Expansion of solids refers to the increase in volume or size of a solid material when it is heated. As temperature rises, the particles within the solid gain energy and vibrate more vigorously, causing them to move apart slightly. This results in an increase in the material's dimensions.

For example, when a metal rod is heated, it expands in length. This phenomenon is important in engineering and construction, as it must be considered to prevent structural damage due to temperature changes.