Final answer:
For the same longitudinal strain, steel will have a greater tensile stress than rubber because steel's Young's modulus is significantly higher.
Step-by-step explanation:
The concept in question involves understanding the relationship between Young's modulus, tensile stress, and strain in materials.
Young's modulus (Y) is a measure of stiffness of a material and is defined as the ratio of tensile stress (force per unit area) to tensile strain (relative change in length).
When comparing materials such as steel and rubber, steel has a much higher Young's modulus than rubber.
When subjected to the same longitudinal strain, the tensile stress in steel will be higher than in rubber, because tensile stress is proportional to Young's modulus, as represented by the formula σ = Yε, where σ is the tensile stress, Y is Young's modulus, and ε is the strain.