4.1.1. Microscopic Point of View

Try these first

1. 1.

   What is shear stress?

   Hint

   Think about forces acting in a fluid.

2. 2.

   Define viscosity in simple terms.

   Hint

   Consider how easily a fluid flows.

3. 3.

   What is shear stress?

   • Pressure applied per unit area
   • Force per unit area causing deformation
   • Friction experienced by fluids

   Hint

   Consider how forces affect fluid movements.

4. 4.

   True or False: An increase in temperature always decreases the viscosity of gases.

   • True
   • False

   Hint

   Think about how molecules behave at different temperatures.

5. 5.

   What is the kinetic energy per unit volume of a fluid with density 1,000 kg/m^3 flowing at a velocity of 2 m/s? Discuss how viscosity would factor into energy loss during flow.

   Hint

   Consider how energy is lost to friction in a flowing fluid.

6. 6.

   Design an experiment to measure the viscosity of a non-Newtonian fluid like ketchup. What factors would you need to consider?

   Hint

   Think about how the fluid behaves under different conditions.