4) what mechanical property (or properties) of silicon make(s) it amenable to being a structural material for mechanical devices? on the other hand what property (or properties) are of concern for using it in structural systems? how might these concerns be addressed? what general practicalities should be considered in the processing / fabrication of silicon devices if we can hope to obtain adequate strength?

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.

Determine the damped natural frequencies and the steady state response of a decoupled damped forced two degrees of freedom system. 10ä1 + 2q1 20q1 10 cos t; 10q2 +4q2 + 40q2 10 cos t

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.