Two airstreams are mixed steadily and adiabatically the first stream enters at 32°c and 40 percent relative humidity at a rate of 20 m/min, while the second stream enters at 12°c and 90 percent relative humidity at a rate of 25 m/min assuming that the mixing process occurs at a pressure of 1 atm determine a) the specific humidity b) the relative humidity c) the dry-bulb temperature d) the volume flow rate of the mixture.

Steel balls 12 mm in diameter are annealed by heating to 1150 k and then slowly cooled to 400 k in an air att 325 k and h -20 w/m2 k. assume the properties of the steel to be k- 40 w/m k,p 7800 kg/m3, and cp 600 j/kg k. a. determine whether lumped system method can be used to analyze this problem and if so why" b. determine the time required for the cooling process. c. determine the total amount of heat lost from each ball to the ambient air