Physics
Grade-9
Easy
Question
Glass containers may crack when a hot liquid is suddenly poured into them because ____.
- The inner surface of the glass expands suddenly
- The outer surface of the glass expands suddenly
- The inner surface of the glass contracts suddenly
- The outer surface of the glass contracts suddenly
Hint:
When hot water is poured into thick glass tumbler, the inner surface of the tumbler becomes hot and expands
The correct answer is: The inner surface of the glass expands suddenly
- When hot water is poured into thick glass tumbler, the inner surface of the tumbler becomes hot and expands. The outer surface of the tumbler does not expand quickly. Due to this uneven expansion, the glass tumbler cracks.
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