A20-mm-diameter shaft transmits a variable bending moment of 0+275 n-m. the frequency of the bending variation is 0.1 s. the shaft is made of high-carbon steel (aisi 1060 hot-rolled). find the endurance life of the shaft. (no need to modify the endurance limit

Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa

Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?