Question

2. Why does a glass tumbler sometimes cracks when hot tea is poured into it?
ninle on which linicolthermometer is based​

Answer 1

Answer:

When hot liquid is poured into the glass tumbler the surface of the glass which comes into the contact of the hot liquid expands rapidly whereas outer surface which is away from the hot liquid does not expand as quickly hence the thermal stress develops which cracks the glass.

Explanation:

hope it helps you

Answer 2

Answer:

When boiling water is poured into a thick tumbler its inner surface expands. However, due to low thermal conductivity of glass, the expansion of outer surface of the tumbler is quite small. Due to uneven expansion of the outer and inner surfaces, the tumbler breaks.