Suppose that you are designing a new telescope that uses a specialized lens with a complex curve pattern. You think that these curves might allow scientists to construct an even bigger telescope. What process would you use to test out your idea before constructing the enormous and expensive final product?

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)