An engineer has invented a new type of 3D printable carbon fiber reinforced polymer. They 3D printed a carbon fiber reinforced bar. The bar has a length of 7.5mm and a cross section area of 5mm^2. They put the bar under uniaxial tensile test and obtained the datasheet (can be found CEE 108, Spring 2021 in the Folder of Week 2 at CCLE). Please (1) determine the linear elastic modulus of this material. (hint: plot the curve, locate the linear section and find the slope of that section). (2) find the elongation at an axial tensile loading of 200N.

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.