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5. The increase in stress with strain after the yield stress is called Toughness Elastic modulus Shear modulus Strain hardening 6. Surface adsorption with the stronger permanent bonds is called: Themisorption Physisorption Surface tension Surface phenomena 7. The rtio between the transverse and longitudinal strain is called Question 2: Short Answer Poisson ratio Elastic modulus Retardation time Damping ratio 8. A material that has the capacity for deformation but cannot withstand low values of stress is called: Ductile tough Brittle