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?

Asimple speed reducer is composed of 2 spur gears. the pinion gear has a pitch diameter of 0.75" and 36 teeth while the driven gear has a pitch diameter of 4.0" and 192 teeth. a)-what is the diametral pitch of each gear? b)-if an electric motor rotating ccw at 3000 rpm is coupled to the pinion, what is the rotational speed of the driven gear? c)-if the torque delivered to the pinion is 1 n-m, what is the torque on the driven gear? d)-what is the power transmitted by the gear train?