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What is thermal expansion ? Write only its types. |
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Answer» SOLUTION :It is our common experience that most SUBSTANCES EXPAND on heating and contract on cooling. A change in the temperature of a body causes change in its dimensions. The increase in the dimensions of a body DUE to the increase in its temperature is called thermal EXPANSION There are three types of thermal expansion : (a) Linear expansion : The expansion in length is called Linear expansion. (b) Area expansion : The expansion in area is called Area expansion. Volume expansion :The expansion in volume is called Volume expansion. All are shown in the figure as below. 
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