Consider two full 100 gallon mixing tanks. The tanks initially contain purewater and 100 lbs. salt, respectively. Mixture from tank 1 is pumped intotank 2 at a rate of 2 gallons/min and mixture from tank 2 is pumped intotank 1 at a rate of 2 gallons/min so that each tank is always completely lled. How long until the amount of salt in tank 1 reaches 40 lbs.?

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.

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.