4.7. Conclusion and Summary

Try these first

1. 1.

   What is shear stress?

   Hint

   Think about forces acting in the same direction as the area.

2. 2.

   What does viscosity measure?

   Hint

   Consider what happens to a syrup's flow compared to water.

3. 3.

   What is shear stress?

   • The force acting perpendicular to a surface
   • The force acting parallel to the surface
   • The measure of a fluid's resistance to flow

   Hint

   Look for definitions related to surface forces.

4. 4.

   True or False: Viscosity changes with temperature only in gases.

   • True
   • False

   Hint

   Consider how liquids behave when heated.

5. 5.

   Analyze the impact of increased temperature on the viscosity of a liquid versus a gas. What practical implications can arise from understanding this behavior?

   Hint

   Consider examples from everyday experiences with cooking oil versus air.

6. 6.

   Given the definition of Newtonian and non-Newtonian fluids, propose an experiment to measure the viscosity of a non-Newtonian fluid, such as cornstarch and water mixture. What observations would you expect?

   Hint

   Think about how the mixture behaves under different mixing speeds.