Light oil at 75°f flows over a 22-ft-long flat plate with a free-stream velocity of 5 ft/s. take the critical reynolds number as recr = 5 × 105 and the density and kinematic viscosity of light oil at 75°f as rho = 55.3 lbm/ft3 and v = 7.751 × 10–3 ft2/s. determine the total drag force per unit width of the plate. (round the final answer to two decimal places.)

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)