Assuming that the length of all horizontal (ab, bc, hi, ij, jk and kl) and vertical (ai, bj and ck) members is 1 m and that p = q = 1kn, determine: the zero-force members, and the force in member ab using the method of joints. is member ab in tension or compression?

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.