Two pounds of a mixture having a mass base analysis of 30% n, 40% co2 and 30% o2 is adiabatically compressed from 1 bar and 300k to 4 bar and 500k. to determine: a) the work in kj b) the amount of entropy produced in kj / k

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

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.