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Get Full Access to Statics And Mechanics Of Materials - 5 Edition - Chapter 8.6 - Problem R8-7
Get Full Access to Statics And Mechanics Of Materials - 5 Edition - Chapter 8.6 - Problem R8-7

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# The stress--strain diagram for polyethylene, which is used to sheath coaxial cables, is ISBN: 9780134382593 479

## Solution for problem R8-7 Chapter 8.6

Statics and Mechanics of Materials | 5th Edition

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Problem R8-7

The stress--strain diagram for polyethylene, which is used to sheath coaxial cables, is determined from testing a specimen that has a gage length of 10 in. If a load Pon the specimen develops a strain of = 0.024 in./in., determine the approximate length of the specimen, measured between the gage points, when the load is removed. Assume the specimen recovers elastically.

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ENGR 121 B Lecture Notes for 9/26/2016 Spencer Kociba Summary of Lecture: how to classify, categorize, modify and conduct operations using matrices and vectors in MATLAB (which stands for Matrix Laboratory) MATRICES ● Matrix: stores a set of values of the same type ○ every value is an element ○ Matrix = m rows, n columns ● Creating Matrices ○ Ex. >> m=[ 1,4,6; 7,8,10; 2,7,15; 3,7,8] becomes a 4x3 matrix ■ 1,4,6 = 1st row, 7,8,10 = 2nd row, etc. ■ ; indicates the end of a row ■ MATLAB will show an error if your elements and the size of the matrix don’t add up ○ >>z=10*rand(3,5) becomes a 3x5 matrix with random numbers from (0,10) ○ >>z(1,2) refers to row 1, column 2 element ○ >>z(2,:) refers to all elements in row 2 ○ >>z(:,2) refers to all elements in column 2 ○ >>z([1,3], end) refers to 1st and 3rd row elements of the last column ● Matrix Multiplication ○ Maxtrix * Matrix = New Matrix ○ In A (n x m) and B (N x M), in order to multiply A*B, m=N. To multiply B*A, M=n ○ >>x=A*B ○ x.^(a) raises each element in matrix x by the power of a ● Matrix f

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