Both bars have the same cross-sectional area 1 = 2 = with allowable tensile and compressive strengths of 20 and 15 respectively. As well, theta1 = theta2 = theta, and the dimension is constant. Determine the optimal design of this truss ( and theta) to obtain the minimum volume while satisfying the given stress constraints (this is the one we did in class). Use trial and error with an Excel spreadsheet and on your excel spreadsheet clearly indicate your design choice.

Agas contained within a piston-cylinder assembly e end nation about same energy states, 1 and 2, where pi 10 bar, v undergoes two processes, a and b, between the sam 0.1 m3, ui-400 kj and p2 1 bar, v2 1.0 m2, u2 200 kj: process a: process from 1 to 2 during which the pressure- volume relation is pv constant process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to +20 0 state 2 kinetic and potential energy effects can be ignored. for each of the processes a and b, (a) sketch the process on p-v coordinates, (b) evaluate the work, in kj, and (c) evaluate process the heat transfer, in kj