A steel wire AB is stretched between rigid supports (see figure). The initial prestress in the wire is 42 MPa when the temperature is 20°C. (a) What is the stress o in the wire when the tem - perature drops to 0°C? (b) At what temperature T will the stress in the wire become zero? (Assume a = 14 x10-6/°C and E=200 GPa.) Steel wire

A steel wire AB is stretched between rigid supports (see figure). The initial prestress in the wire is 42 MPa when the temperature is 20°C. (a) What is the stress o in the wire when the tem - perature drops to 0°C? (b) At what temperature T will the stress in the wire become zero? (Assume a = 14 x10-6/°C and E=200 GPa.) Steel wire

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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Why is the answer b?