A steel wire 2.1mm in diameter and 270mm long is pulled in tension with a load of 245N, which produces only elastic deformation. (a) Calculate the resulting strain. (b) An aluminum wire having the same length (270mm ) is subjected to the same tensile load as the steel in part (a) (245 N). What diameter of aluminum wire is required to yield the same strain value as for the steel? (a) (b) mm