Show that the octahedral shear stress τ0 (the magnitude of the tangential component of the traction vector on the octahedral plane, that is, a plane whose normal makes equal angles with the three principal directions) is given by τ0 = q 2 3 IIs, where IIs is the second invariant of the stress deviator.

Agas mixture consists of 8 kmol of h2 and 2 kmol of n2. determine the mass of each gas and the apparent gas constant of the mixture.

For each of the following process: a) sketch the p-v diagram, b)sketch t-s diagram, c) sketch t-v diagram, d) sketch the boundary work on one of the diagrams (a, b or c) and e) sketch the reversible heat transfer on one of the diagrams (a, b or c): 1- isobaric process from compressed liquid to superheated vapor 2- isothermal process from compressed liquid to superheated vapor 3- isentropic process from compressed liquid to superheated vapor

The sum of the normal stresses does not change as the stress state rotates through an angle. a)-trune b)- false