For a steel alloy it has been determined that a carburizing heat treatment of 5-h duration will raise the carbon concentration to 0.45 wt% at a point 3 mm from the surface. At what distance (in mm) from the surface will the carbon concentration be 0.45 wt% if the carburization is allowed for 45 h while maintaining the same temperature?

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.

Which one from below is not one of the reasons of planning failures? (clo3) a)-planner is careless. b-planner spend less time in the field but more time on the desk c)-planner is not qualified d)-planner does not have sufficient time to properly plan