Consider a rod transmitting a tensile force. The following materials are being considered for the given application: tungsten carbide, zinc alloy, polycarbonate polymer, and aluminum alloy. 3. a. Determine the material index fM). b. Using Ashby chart (Fig. 2.19), select the best material for its strength to weight ratio.

Asteam is contained in a rigid tank with a volume of 1 m3. initially, the pressure and temperature are 7 bar and 500 oc, respectively. the temperature drops due to cooling process. determine: (1) the temperature at which condensation begins in °c, (2) the fraction of the total mass that has condensed when the pressure decreased to 0.5 bar. (3) the volume in m3 occupied by saturated liquid at the final state?