Problem $9\mathrm{.}65$

The thin$-$walled pipe has an inner diameter of $0\mathrm{.}5$ in and a thickness of $0\mathrm{.}025$ in$.$

If it is subjected to an internal pressure of $421$ psi and the axial tension and torsional loadings shown, determine the principal stress at a point on the surface of the pipe. $($Figure $1)$

Enter your answers numerically separated by a comma.

X Incorrect; Try Again; $2$ attempts remaining Term $2$: Review your calculations and make sure you round to $3$ significant figures in the last step.

Figure