The shaft, made of aisi 1040 cd steel, rotates at 1600 rpm and is supported in the rolling bearings at a and b. the applied forces are f1=2500 lbf and f2=1000 lbf. determine the minimum fatigue factor of safety based on achieving infinite life. if infinite life is not predicted, estimate the number of cycles to failure. also check for yielding. (hint: use attached charts to calculate static stress concentration factors kt and kts and dynamic stress concentration factors kf and kfs at steps in shaft.)

The mini-refrigerator fire was most likely caused by what type of wiring?

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. a conductor is placed in an external electrostatic field. the external field is uniform before the conductor is placed within it. the conductor is completely isolated from any source of current or charge. part a: which of the following describes the electric field inside this conductor? it is in the same direction as the original external field.it is in the opposite direction from that of the original external field.it has a direction determined entirely by the charge on its surface.it is always zero. part b: the charge density inside the conductor is: 0non-zero; but uniformnon-zero; non-uniforminfinite part c: assume that at some point just outside the surface of the conductor, the electric field has magnitude e and is directed toward the surface of the conductor. what is the charge density η on the surface of the conductor at that point? express your answer in terms of e and ϵ0