Figure 12
8. figure 13 shows a circuit that consists of three
identical resistors. the total voltage (vt) is 12 v.
(a) what is the voltage of each resistor?
(b) the current in the third resistor (r3) is
500 ma. determine the current in the first
resistor (r1).
(c) what is the combined (total) resistance of
the three resistors?

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)