Abar of steel has the minimum properties se =40 kpsi. 5y = 60 kpsi, and sat, = 80 kpsi. the bar is subjected to a steadytorsional stress of 15 kpsi and an alternating bending stress of 25 kpsi. find the factor of safety guarding against a staticfailure, and either the factor of safety guarding against a fatigue failure or the expected life of the part. for the fatigueanalysis use: (a) modified goodman criterion.(bl gerber criterion.(6) asme-elliptic criterion.

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?

Technician a says that in a worm gear steering system, most excessive steering free play is usually found in the gearbox. technician b says that in a rack-and-pinion steering system, excessive free play can be found in the bushings. who is correct?

Aheat pump using refrigerant-134a heats a house by using underground water at 8°c as the heat source. the house is losing heat at a rate of 60,000 kj/h. the refrigerant enters the compressor at 280 kpa and 0°c, and it leaves at 1 mpa and 60°c. the refrigerant exits the condenser at 30°c. determine: (a) the power input to the heat pump, (b) the rate of heat absorption from the water, and (c) the increase in electric power input if an electric resistance heater is used instead of a heat pump