Explain an application of the force developed due to expansion in daily life
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Thermal expansion definition
Most of the substances solids, liquid, and gases expand on heating and contract on cooling. Their thermal expansions and contractions are usually small and are not noticeable. However, these expansions and contractions are important in our daily life.
The kinetic energy of the molecules of an object depends on its temperature. The molecules of a solid vibrate with larger amplitude at a high temperature than at low temperatures. Thus, on heating, the amplitude of vibration of the atoms or molecules of an object increases. They push one another farther away as the amplitude of vibrations increases. Thermal expansion results in an increase in length, breadth, and thickness of a substance.
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