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phrygian
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Homework Statement
Prove that the volume thermal expansion coefficent of a solid is equal to the sum of its linear expansion coefficients in the three directions: B = Ax + Ay + Az
Homework Equations
B = (dV/V)/dT
A = (dL/L)/dT
The Attempt at a Solution
My thought was using dV/V = ((dLx*dLy*dLz)/(Lx*Ly*Lz)) but when you use this it is clear that dL^3/L^3 does not equal 3* dL/L
What am I doing wrong?
Thanks for the help