You have designed a bone plate that is manufactured via rolling under cold working conditions, and tests show good biocompatibility results for the device. The Manufacturing Department has put in a request to change the processing method to rolling under hot working conditions, in an effort to reduce the total manufacturing cost. Since the material from which the device is fabricated will not change, do you need to rerun the biocompatibility tests? Why or why not? (10 points)

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way

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.

Wiy doeres rere okhn a pump whon working betwon the same pressure range?