Question

A thick glass tumbler cracks when hot water is poured into it.

• A. True
• B. False

Answer 1

The correct option is A True

1. The reason for cracking of thick water tumbler when hot water is poured into it is that glass is a bad conductor of heat.
2. Thus, the inner surface of the tumbler expands more than the outer surface.
3. Due to this uneven expansion, a strain builds up in the glass.
4. It is this strain that cracks the glass.

Hence, the given statement is true.