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Area and Volume Expansion

The coefficie...

Question

The coefficient of linear expansion of of a crystal in one direction is _a1and in every direction perpendicular to is a2. The coefficient of cubical expansion is:

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Solution

The cubical expansion of the crystal is equal to the sum of coefficient of linear expansions in three mutually perpendicular directions.
equation of cubica expansion, γ = αx + αy + αz (x, y, z are perpendicular)
So, γ = a1 + a2 + a2
γ = a1 + 2*a2
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