78. The ration of linear stress to the linear strain is called-
Explained:-young modulus of elasticity of a material is the ration of longitudinal stress to the strain of some material. Bulk modulus of elasticity is the ration of hydrostatic stress to volumetric strain. K Y or here, K= Bulk modulus, Y = 3(1-20)3(m-2) young'smodulus, o Possion'sration