For some people, knowing that 21 different government agencies are authorized to gather intelligence data provides them with a sense of security. Others believe that this creates a significant opportunity for duplication of effort and wasted resources. Still others are concerned that everything about them and what they do is known by the government. Choose one side of this issue and defend your position.

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)