2. Present in a complex form (general and exponential form), and draw in a complex plane the voltage, as well as the vector -phasor of the voltage, whose current value is u (t) = 212.13 ∙ sin (ω ∙ t - 63˚) v

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.