Applications of Thermal Expansion and Contraction of Solids

Thermal Expansion
Almost all the substances (solids, liquids and gases)expand on heating and contract on cooling.Few exceptions are; water from 0°C, silver iodide from 80°C to 141°C and silica below- 80°C which contract on heating and expand on cooling.The expansion of a substance on heating is called the thermal expansion of substance.
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