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Area Expansivity
Defination of Area Expansivity.
The Area Expansivity of a Solid at constant pressure is the fraction of its Area at Zero Degree by which the Area of a fixed mass expands per kelvin rise in temperature.
Mathematically,
Area Expansivity.=dA / A .dT
Where dA = change in Area
A= Original Area
dT = change in Temperatutre
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area expansivity