Consider a metal rod that is 8.894 mm in diameter and 4.952 m in length. The elastic modulus for this type of material is 112 GPa. A tensile load of 66,523 N is applied to the rod. Assuming that the material behaves elastically under this load.
(a) Calculate the length (in the unit of meter) of the rod under this load. Please keep three decimal with your answer, i. e., your answer should be in the format of x. xxx. Please do not include units in your answer.

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.