Question

Chapter 18, Problem 18.03 XIncorrect. A gold wire 4.0 mm in diameter is to offer a resistance of no more than 15 Ω. Using the data in Table 18.1, compute the maximum wire length Table 18.1 Room-Temperature Electrical Conductivities for Nine Common Metals and Alloys Metal Silver Copper Gold Aluminum Brass (70 Cu-30 Zn) Electrical Conductivity [(a-m ] 6.8 x 10 6.0 x 10 4.3 x 10 3.8 x 10 1.6 x 10 1.0 x 10 0.94 x 107 0.6 x 10 0.2 x 10 Iron Platinum Plain carbon steel Stainless steel 4.1E6 A metal w e 19 m ongis cooled from 39 to-1 C. How much o a change in length will the wire experience if the coefficient of thermal expansion or this metal is 22 i.e., the wire shrinks), insert a minus sign before the numerical answer 10 C 캤 the change in length is negative TM

Answer 1

15A. rea- TTD 4 12.56mm 4 12-56x1▼ 15 x 12.3b XCV tangh oh i L - 3120 m