JAMB - Physics (2024 - No. 26)
A thick glass tumbler cracks when boiling water is poured into it because
The inside expands more rapidly than the outside
The inside expands less rapidly than the outside
The expansion is even
It does not expand
Forklaring
When boiling water is poured into the tumbler, the inner surface heats up and expands quickly, while the outer surface remains cooler and expands more slowly. This difference in expansion rates creates stress in the glass, leading to cracks.