Which of the following is the primary factor in determining if a sheet metal can be bent and formed into another shape without experiencing fracture and other undesirable defects (such as cracks)? (a) ultimate tensile strength (b) modulus of elasticity e) ductility fracture strength

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.