Question

A solid cube has its superficialExpansivity as 1.01*10-6 K-1 Find it's cubic expansivity

Answer 1

Since superficial expansivity is 2 times greater than linear:

$$\beta=2\alpha.$$

Linear and cubic expansivities:

$$\gamma=3\alpha.$$

Rearrangement gives us

$$\gamma=\dfrac 32\beta=1.52·10^{-6}\text{ 1/K}.$$