If the number of teeth in the gears 1 and 2 are 60 and 40, the module pitch =3 mm, the pressure angle 20o and the addendum = 0.318 of circular pitch determine the velocity of sliding when the contact is at the tip of the tooth of gear 2 and the gear 2 rotates at 800 rpm

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.