If 200 CFM of outside air at 100 Tdb and 75 Twb is mixed with 800 CFM of return air at 80 Tdb and 50%RH, find the following properties of the mixed air.

Air flows over a heated plate àt a velocity of 50m/s. the local skin factor coefficient at a point on a plate is 0.004. estimate the local heat transfer coefficient at this point.the following property data for air are given: density = 0.88kg/m3 , viscosity 2.286 x 10 ^-5 kgm/s , k = 0.035w/mk ,cp = 1.001kj/kgk. use colburn reynolds analogy.