Question
Physics Question on thermal properties of matter
: When hot water is poured in a thick glass tumbler then the tumbler breaks : Glass is a bad conductor of heat
A
A and R are correct and R is correct explanation for A
B
A and R are correct and R is not correct explanation for A
C
A is true and R is false
D
A is wrong and R is true..
Answer
A and R are correct and R is correct explanation for A
Explanation
Solution
When hot water is poured into a thick tumbler its inner surface expands. However, Since glass is bad conductor of heat , the heat does not go to outer surface and the expansion of outer surface of the tumbler is quite small. Due to uneven expansion of the outer and inner surfaces, the tumbler breaks. because the heat will try to escape but the glass would not allow it and in the process ultimately glass breaks down.