A device is normally energized if the schematic diagrams shows that the device is A. Connected directly to a closed switch
B. Connected in series with another device
C. A part of a closed circuit connected to a power source
D. Positioned near the source of power

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.