Answered: A band of polyisoprene is to hold…

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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Question

A band of polyisoprene is to hold together a bundle of steel rods for up to 1 year (52 weeks). If the stress on the band is less than 10MPa at that stage, the band will not hold the rods tightly any longer. Determine the initial stress that must be applied to the polyisoprene band when it is slipped over the steel. A series of tests showed that an initial stress of 7MPa decreased to 6.8MPa after 6 weeks.

A.
None of the mentioned/ Geen van die genoemde
B.
σ = 13.03 MPa
C.
σ = 10.29 MPa
D.
σ = 11.73 MPa

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