Part A

What is $d_o?$

Express your answer in inches to three significant figures.

$d_o=|,in.$

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Part B

What is $d_i?$

Express your answer in inches to three significant figures.

$d_i=$The tubular shaft is supported by a smooth thrust bearing at B

and smooth journal bearing at A

as shown in $($Figure $1).$ If the material has an allowable bending stress of $\backslash$sigma allow

$=15$ ksi

$,$ determine the required minimum outer diameter and the corresponding inner diameter of the shaft. Take the inner radius to be $0\mathrm{.}8$ times the outer radius, that is$,$ ri

$=0\mathrm{.}8$ro

$.$