Air at standard pressure flows across a flat plate at 3m/s. the temperature surface is 50°c and the surrounding temperature is 20°c. consider a point 1m away from the leading edge of the plate. see table a-15 in appendix 1 for properties of air. a. determine the reynold's number and prandtl number for this flow at the location b. c. d. e. described above. determine the local flow boundary layer thickness. determine the local thermal boundary layer thickness for this flow. find the local nusselt number. based on this nusselt number, what is the local convective heat flux from the plate to the air?

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false