A copper wire is stretched with a stress of 90 MPa (10,000 psi) at 30°C (68°F). If the length is held constant, to what temperature must the wire be heated to reduce the stress to 45 MPa (5000 psi)? Ecu = 110 GPa; a = 17 (10-6)/ °C %3D

A copper wire is stretched with a stress of 90 MPa (10,000 psi) at 30°C (68°F). If the length is held constant, to what temperature must the wire be heated to reduce the stress to 45 MPa (5000 psi)? Ecu = 110 GPa; a = 17 (10-6)/ °C %3D

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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This question was answered for me but the second answer is not clear how he/she got 0.55 and 0.45 for the rods.