Explain at least three control features/aspects of the continuous casting process of steel that are used to limit steel exposure to the air and promote inclusion removal. Consider (where applicable) how each part of the continuous casting process is designed to accomplish this.

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?

Modern high speed trains do not have perpendicular expansion gaps where rails are joined end-to-end any more they are mostly welded together but what might happen if there was a spell of particularly hot weather that causes inspection of the tracks?