Does the orientation of the normal stress arrows for the x-direction in the following image indicate that they are positive or negative?

At a point in a body subjected to plane strain, the strains are εx = –100 με, εy = 740 με, and γxy = 430 μrad. Determine the angle θs corresponding to the orientation of the maximum in-plane shear strain at the point.

At a point on the free surface of a steel automotive component [E = 28,500 ksi,ν = 0.19], a strain rosette was used to obtain normal strains of εa = 175 με, εb = –365 με, and εc = 27 με. Determine normal strain εx at the point.

A silicone rubber [E = 3.90 MPa, G = 1.30 MPa] wristband has an initial length of 105 mm and a width of 12 mm. If the wearer imparts a normal stress of 470 kPa in the length direction while putting it on, what is the corresponding change in width?

At a point in a body subjected to plane strain, the strains are εx = 460 με, εy = 310 με, and γxy = 230 μrad. Determine the magnitude of the absolute maximum shear strain at the point.

At a point in a body subjected to plane strain, the strains are εx = 100 με, εy = 390 με, and γxy = –220 μrad. Determine normal strain εt at the point for a counterclockwise coordinate rotation of 59°.

At a point in a body subjected to plane strain, the strains are εx = 720 με, εy = –230 με, and γxy = –340 μrad. Determine the diameter D of the corresponding in-plane Mohr’s circle.

At a point subjected to plane stress on the surface of a ladder rung, the stresses are σx = 0.55 MPa, σy = 0 MPa, and τxy = –1.03 MPa. Determine the angle θs corresponding to the orientation of the maximum in-plane shear stress at the point.

At a point subjected to plane stress on the surface of a structural member, the stresses are σx = –45 MPa, σy = –80 MPa, and τxy = 30 MPa. Determine the magnitude of the absolute maximum shear stress at the point.

At a point subjected to plane stress on the surface of a structural member, the stresses are σx = 55 MPa, σy = 75 MPa, and τxy = 30 MPa. Determine the magnitude of the absolute maximum shear stress at the point.