Applications of Expansion and Contraction
Applications of Expansion and Contraction: Overview
This topic describes the different applications of expansion and contraction. It further explains with the help of diagrams, the expansion of metal, mercury, etc.
Important Questions on Applications of Expansion and Contraction
Sam took out porridge kept in a glass bowl from the refrigerator. As he wanted to have it hot, he put it directly into the microwave oven for heating. To his surprise the glass bowl had cracked!! Can you help him figure out why this had happened?
Instead of mercury metal can we use copper metal in a thermometer? (Hint: which state, solid or liquid, shows more expansion or contraction on change of temperature)
Why are gaps left between rails on a railway track?
Why can a tight metallic lid on a glass bottle be opened easily if immersed in hot water for some time?
Why is a mercury thermometer used to measure temperature?
What is the increase in the volume of a substance called?
