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Elements Of Electromagnetics
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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(a) Show that the polar radius of gyration kO of the annular area shown is approximately equal to the mean radius Rm= (R1 + R2)/2 2 for small values of th thickness t= R2 - R1. (b) Determine the percentage error introduced by using Rm in place of kO for values of t/ Rm respectively equal to 1, 1/2 and 1/10.
Fig. P9.19

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