Physics for IGCSE & O level - Thermal Effects (Section 3 - No. 6)
How does the kinetic theory explain the expansion of solids?
Particles become smaller.
Particles move slower.
Particles speed up and spread apart.
Particles change shape.
คำอธิบาย
When heated, particles gain kinetic energy, move faster, and push each other further apart, causing the solid to expand.