Physics 2015 JAMB Past Questions - Question 48: when very hot water is poured into two identical thin and thick glass tumblers in equal volumes, the thick one cracks :because of

Correct Answer

C

Explanation

When very hot water is poured into two identical thin and thick glass tumblers in equal volumes, the thick one may crack due to a phenomenon called thermal stress.

Thermal stress occurs when there is a significant temperature difference between different parts of an object. In this case, the hot water causes the inner surface of the thick glass tumbler to expand rapidly, while the outer surface remains relatively cooler. This temperature difference creates stress within the glass, and if the stress exceeds the glass's strength, it can lead to cracking or even shattering.

Thick glass tumblers have a higher thermal resistance compared to thin ones, meaning they take longer to heat up and expand. As a result, the temperature difference between the inner and outer surfaces of the thick tumbler can be more significant, increasing the likelihood of cracking.

It's important to note that glass is a brittle material, and sudden temperature changes can cause it to break. To prevent this, it is advisable to use tempered or heat-resistant glassware specifically designed to withstand thermal stress.