The block shown is made of a magnesium alloy for which E = 45 GPa and ν = 0.35. Knowing that σx = –180 MPa, determine (a) the magnitude of σy for which the change in the height of the block will be zero, (b) the corresponding change in the area of the face ABCD, (c) the corresponding change in the volume of the block.
Fig. P9.81

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