Define coefficient of superficial (areal) expansion of a solid, state its unit and dimensions.
Define coefficient of superficial (areal) expansion of a solid, state its unit and dimensions.
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1. Coefficient of superficial (areal) expansion of a solid is defined as the increase in area per unit original area at 0 °C per degree rise in temperature
It is denoted by β and given by,
β = \(\frac{A_2-A_1}{A_1(T_2-T_1)}\)
where, A1 = Area of solid sheet at T1 °C,
A2 = Area of solid sheet at T2 °C
2. Unit: 0°C-1 or K-1
3. Dimensions: [L0M0T0K-1]
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