Which property is defined as the ratio of stress to strain in the elastic region?

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Multiple Choice

Which property is defined as the ratio of stress to strain in the elastic region?

Explanation:
Stiffness of a material is captured by how much it resists deformation under load, expressed as the ratio of stress to strain in the elastic region. This ratio is Young's modulus. In the elastic region, Hooke’s law applies: stress equals E times strain, so E is the slope of the stress–strain curve there and defines the material’s stiffness. Tensile strength is about the maximum stress the material can endure before failure, not the elastic ratio. Hardness relates to resistance to surface indentation, not elastic deformation. Flexural modulus comes from bending tests and, while related to stiffness, is not the defining ratio in the elastic region.

Stiffness of a material is captured by how much it resists deformation under load, expressed as the ratio of stress to strain in the elastic region. This ratio is Young's modulus. In the elastic region, Hooke’s law applies: stress equals E times strain, so E is the slope of the stress–strain curve there and defines the material’s stiffness. Tensile strength is about the maximum stress the material can endure before failure, not the elastic ratio. Hardness relates to resistance to surface indentation, not elastic deformation. Flexural modulus comes from bending tests and, while related to stiffness, is not the defining ratio in the elastic region.

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