A 2 m long rectangular duct with a cross section 80 mm x 125 mm, is maintained at a constant surface temperature of 425 K. Air, at 1 atm and 310 K, flows into the duct with a mass flow rate of 0.08 kg/s. Calculate the heat transfer rate to the air from the duct and the air outlet temperature. Estimate Tm

The flow rate of air through a through a pipe is 0.02 m5/s. a pitot static tube is placed in the flow. the radius of the pitot static tube is 1 mm. assuming the flow to be steady and the air to be at 300k, calculate the difference in total and static pressure if the diameter of the pipe is: (a) d 0.1 m d 0.05 m (c) d 0.01 m