A crystal has a coefficient of expansion\ $13 imes 10^{-7} /{ }^{\circ} \mathrm{C}$ in one direct

Question

A crystal has a coefficient of expansion\ $13 	imes 10^{-7} /{ }^{\circ} \mathrm{C}$ in one direction and $231 	imes 10^{-7} /{ }^{\circ} \mathrm{C}$ in every direction at right angles to it. The cubical coefficient of expansion is\

Professor PC Thomas Classes · Answer

$\alpha_{\mathrm{v}}=\left(\alpha_{l}ight)_{\mathrm{x}}+\left(\alpha_{l}ight)_{\mathrm{y}}+\left(\alpha_{l}ight)_{\mathrm{z}}$\ $=$\