If all the dimensions of a prismatic bar are doubled, then the maximum stress produced in it under its own weight will

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• At a point in a steel member, the major principal stress is 2000 kg/cm2 and the minor principal stress is compressive. If the uni-axial tensile yield stress is 2500 kg/cm2, then the magnitude of the minor principal stress at which yielding will commence, according to the maximum shearing stress theory, is
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• The deformation of a bar under its own weight is
• The elongation of a conical bar under its own weight is
• The elongation of a conical bar under its own weight is equal to