A1.5-in-diameter bar has been machined from an aisi 1050 cold-drawn bar. this part is withstand a fluctuating tensile stress varying from 0 to 18.0 kpsi. because of the ends, and the fill radius, a fatigue stress-concentration factor ky is 1.6 for 10 or larger life. the fully correcte endurance limit is s 34 kpsi, sat= 100 kpsi and s, 84 kpsi. find the factor of safety guardin against fatigue, using the modified goodman fatigue line and first-cycle yielding

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.