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  4. Coefficient of superficial expansion of solid is 2× 10-5/° C . Its coefficient of linear expansion is:

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Q. Coefficient of superficial expansion of solid is $ 2\times 10^{-5}/^{\circ} C $ . Its coefficient of linear expansion is:

ManipalManipal 2003Thermal Properties of Matter

Solution:

Coefficient of superficial expansion of solid is $2 \times 10^{-5} /{ }^{\circ} C$. Its coefficient of linear
expansion $\alpha =\frac{\beta}{2}=\frac{2 \times 10^{-5}}{2}$
$=1 \times 10^{-5} /{ }^{\circ} C .$