Calculate the fraction of lattice sites that are Schottky defects for cesium chloride at 573 oC (this temperature is below the melting temperature (645oC)). Assume an energy for defect formation of 1.86 eV.

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.