Using information contained in Figures 18.8 and 18.39, determine the electrical conductivi...

Using information contained in Figures 18.8 and 18.39, determine the electrical conductivity of an 85 wt% Cu–15 wt% Zn alloy at -100°C (-150°F).

Figure 18.8 The electrical resistivity versus temperature for copper and three copper–nickel alloys, one of which has been deformed. Thermal, impurity, and deformation contributions to the resistivity are indicated at -100°C. [Adapted from J. O. Linde, Ann. Physik, 5, 219 (1932); and C. A. Wert and R. M. Thomson, Physics of Solids, 2nd edition, McGraw-Hill Book Company, New York, 1970.]

Figure 18.39 Room-temperature electrical resistivity versus composition for copper–zinc alloys.

[Adapted from Metals Handbook: Properties and Selection: Nonferrous Alloys and Pure Metals, Vol. 2, 9th edition, H. Baker (Managing Editor), 1979. Reproduced by permission of ASM International, Materials Park, OH.]