Select the correct answer. The following diagram shows a junction with various currents flowing in and out of it. What is the current x? 0.5A 2 A 0.4A 02A OA 2.1 A O B. 3.1 A O C. -2.1 A OD. 0.5 A

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)