What similarity do all the accusative singulars of all three declensions share? 2. what similarity do all the accusative plurals of all three declensions share? 3. what similarity do all the genitive plurals of all three declensions share? 4. what cases does -is indicate in first and second declension? in third declension? how will you tell the difference? 5. what similarity do you notice about the dative and ablative plural in all three declensions?

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.