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?

energy can cross the boundaries of a closed system in the form of heat and mass

explanation:

answer:

put more,

answer:

explanation:

assault rifle is a rapid-fire, magazine-fed rifle designed for military use. it is a shoulder-fired weapon that allows the shooter to select between semi-automatic (requiring you pull the trigger for each shot), fully automatic (hold the trigger and the gun continuously fires) or three-shot-burst modes.

answer:

a

explanation: