Question: what is the relationship between linear and cubic expansivity?
Answer: Cubic / volume expansivity is the increase in volume per unit volume of a substance for every one degree Celsius rise in temperature. ∆θ = θ₂ - θ₁ . ... DERIVATION OF THE RELATIONSHIP BETWEEN LINEAR EXPANSIVITY AND CUBIC EXPANSIVITY: Let us consider a sheet of metal of length l , breadth b and height h.