Question 1 The graph below shows the electrical conductivity of some elements from the periodic table. Antimony Carbon Ruthenium Copper Silver 20 40 60 80 Electrical conductivity (x10° S/m) 1.1. With the aid of a clearly labelled graph, describe the effect of temperature on the electrical conductivity of copper and antimony. 1.2. Explain the difference in the electrical conductivity of ruthenium and antinomy. 1.3. Adding small quantities of boron may increase the electrical conductivity of antimony. With the aid of a labelled diagram, explain how this is possible. Besides lower electrical conductivity, suggest a reason why ruthenium is not used in electrical transmission wires. Give a detailed response. 1.4.

Question 1 The graph below shows the electrical conductivity of some elements from the periodic table. Antimony Carbon Ruthenium Copper Silver 20 40 60 80 Electrical conductivity (x10° S/m) 1.1. With the aid of a clearly labelled graph, describe the effect of temperature on the electrical conductivity of copper and antimony. 1.2. Explain the difference in the electrical conductivity of ruthenium and antinomy. 1.3. Adding small quantities of boron may increase the electrical conductivity of antimony. With the aid of a labelled diagram, explain how this is possible. Besides lower electrical conductivity, suggest a reason why ruthenium is not used in electrical transmission wires. Give a detailed response. 1.4.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.73P: Estimate the R-values for a 5-cm-thick fiberglass board and a 2.5-cm-thick polyurethane foam layer....

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