2.3.3. Assumptions in Fluid Mechanics

Try these first

1. 1.

   What is the definition of equilibrium in fluid mechanics?

   Hint

   Think about the balance of forces.

2. 2.

   Define Surface Tension.

   Hint

   Consider how droplets form.

3. 3.

   What is Pascal's law?

   • A law concerning gases only
   • A law that states pressure changes are transmitted uniformly in fluids
   • A law pertaining to solids only

   Hint

   Remember how pressure affects different fluids.

4. 4.

   True or False: Surface tension increases with the increase in temperature.

   • True
   • False

   Hint

   Think about how heat affects liquid properties.

5. 5.

   A cylindrical container of diameter 0.1 m is filled with water, and the water reaches a height of 0.5 m. Calculate the hydrostatic pressure at the bottom of the container.

   Hint

   Apply the hydrostatic pressure equation.

6. 6.

   If the surface tension of a liquid is 0.072 N/m and the contact angle is 30 degrees in a capillary tube of radius 0.002 m, calculate the height of the liquid column.

   Hint

   Remember to convert the angle to radians if necessary.