Atorsion bar is used as a suspension element for a vehicle. the bar has a diameter of 20 mm. it is subjected to a torsional moment of 450 n·m and an axial tensile force of 36.0 kn. draw a stress element on the surface of the bar, and then draw the mohr's circle for the element.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

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)

Plan an experiment to measure the surface tension of a liquid similar to water. if necessary, review the ncfmf video surface tension for ideas. which method would be most suitable for use in an undergraduate laboratory? what experimental precision could be expected?