The $60-$mm$-$diameter shaft is made of $6061-$T$6$ aluminum having an allowable shear stress of ${}_{\text{a}\text{l}\text{l}\text{o}\text{w}}=85$MPa.

$($Figure $1)$

Figure

$1$ of $1$

Find the corresponding angle of twist of disk A relative to disk $C.$

Express your answer using three significant figures.

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Part B

Determine the maximum allowable torque $T.$

Express your answer to three significant figures and include the appropriate units.

$T=$

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Part $B$

Find the corresponding angle of twist of disk A relative to disk $C.$

Express your answer using three significant figures.

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