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  4. A piece of glass is heated to a high temperature and then allowed to cool. If it cracks, a probable reason for this is

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Q. A piece of glass is heated to a high temperature and then allowed to cool. If it cracks, a probable reason for this is

NTA AbhyasNTA Abhyas 2020Thermal Properties of Matter

Solution:

When a piece of glass is heated, due to low thermal conductivity it does not conduct heat fast enough and as a result, unequal thermal expansion takes place. Due to this unequal thermal expansion of its layers, the glass cracks