The electrical conductance of a Cu-40 wt% Zn wire is measured. How much less conductive is it than a 60% cold-worked pure Cu wire?

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Yield strength (psi) 60,000 Electrical 50,000 conductivity 40,000 30,000 20,000 10,000 0 Yield strength T T 60 50 40 20 I 0 20 40 60 80 Percent cold work (a) Electrical conductivity (us2-¹m-¹) Yield strength (psi) 60,000 50,000 40,000 30,000 20,000 10,000 0 Electrical conductivity Yield strength 20 40 60 Weight percent zinc (b) T T 60 50 40 30 20 10 0 80 Electrical conductivity (us-¹m-¹)