A journal bearing has a journal diameter of 2.500 +0.000/-0.003 in. The bushing bore has a diameter of 2.506 +0.004/-0.000 in. The bushing is 2 in long and supports a 500-lbf load. The journal speed is 1200 rev/min. For a minimum clearance assembly, find the minimum oil film thickness and the maximum film pressure for both SAE 30 and SAE 20W-50 lubricants, for the tightest assembly if the operating film temperature is 180°F

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.