3.2.2. Microscopic Analysis

Try these first

1. 1.

   What is the definition of density?

   Hint

   Think of what density means in everyday terms.

2. 2.

   How does specific gravity relate to water?

   Hint

   Consider how heavier or lighter substances compare to water.

3. 3.

   What is the relationship between shear stress and velocity gradient according to Newton's law?

   • They are inversely proportional
   • They are directly proportional
   • They are independent

   Hint

   Think about how shear stress changes with flow speed.

4. 4.

   True or False: Specific gravity of a substance greater than 1 indicates it is lighter than water.

   • True
   • False

   Hint

   Consider the definition of specific gravity.

5. 5.

   You have two fluid samples. Liquid A has a density of 1200 kg/m³, and Liquid B has a density of 800 kg/m³. Calculate the specific gravity of both liquids.

   Hint

   Remember to compare each density with the density of water.

6. 6.

   Design an experiment to illustrate how viscosity changes with temperature. What observations would you make?

   Hint

   Consider practical examples like oil or syrup.