User talk:Modestandrew

This article, in the section Physical Characteristics, contains an inaccurate statement. The statement reads: "Aluminium has about one-third the density and stiffness of steel."

The above statement is not accurate, based on the engineering definition of stiffness. Stiffness is a function of not only modulus of elasticity, but also of density. Although aluminium has about one-third the density of steel, and also about one-third the modulus of elasticity of steel, "stiffness" is the wrong word/term to use.

A better statement would be: "Aluminium has about one-third the density and one-third the modulus of elasticity, compared to steel."

Modestandrew (talk) 03:37, 15 December 2013 (UTC)