A 6 ft high column is made from a hollow steel shell filled with concrete. The steel shell cross-section is 6 in x 6 in square with a wall thickness of 1⁄2 in. The column is subjected to a load of 1,000 kips. ES = 29x106 psi, and EC = 3.5x106 psi. a. Calculate the load supported by the steel and by the concrete. b. Calculate the stress in the steel and the stress in the concrete. c. Calculate the deflection of the column.

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.