Determine average normal stress. Express your answer in pounds per squared inch to three significant figures. VE ΑΣΦΑ1 | vec ?

Need only a handwritten solution only (not a typed one).

For the stress element below, when a = 9, b = 4, and c = 5, the principal stress σ2 , the smallest normal stress, is:  ____ MPa. Calculate your answer to 1 decimal place. Input then negative '-' sign, if the answer is negative.

In a tensile test for an aluminum alloy, the sample is 2 inches long and 0.5 inches in diameter. The proportional portion of the tension stress-strain diagram for an aluminum alloy is shown below.  Determine the axial stress of the sample under a tensile load of 9 kips: ____ ksi. Pay attention to units and calculate your answer to 1 decimal place.

One shaft is in torsion as shown below. If the magnitude of shear stress at point A is 345.6 MPa, calculate the magnitude of the shear stress at point B on the same cross-section as point A: MPa. Calculate your answer to 1 decimal place. 40 mm 30 mm T

The pressure in a cast-iron water pipe is 180 psi. If the inside diameter of the pipe is 15 in. and the allowable unit stress in tension is 2000 psi, what should be the thickness of a shell of the pipe, expressed as a multiple of 1/8 in. A. 3/4 in. B. 5/8 in. C. 1/2 in. D. 3/8 in.