Look at the construction-related contexts below and suggest the material that is most appropriate for each construction requirement. Explain your reasoning. a. Construction of a dome-shaped building with traditional-style architecture b. Construction of a modern tower—large budget provisions, but very limited time available for construction c. Construction of a concert hall in a region with extreme heat

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?

Anormal toothed involute standard spur gear with z=21 teeth, modulus m-3mm and pressure angle a=20°. calculate the reference circle diameter dof this gear, base circle diameter di, addendum diameter da and the pressure angle of the tooth profile curve on the addendum circle.

1.0 kg of air at 300 k and 100 kpa (state 1) is slowly compressed in a piston cylinder (closed system). the compression process is an isothermal process (t= constant) which is a special polytropic process with a polytropic index n i. the pressure of the air at the end of the compression process is 300 kpa (p2). assuming that air is an ideal gas with constant specific heats. a)- find the work transfer in this compression process b)- find the heat transfer in this compression process. ignoring the kinetic and potential energy changes. c)- find the isentropic efficiency of this compressor