2. Equilibrium Conditions

Try these first

1. 1.

   What is meant by equilibrium conditions in fluid mechanics?

   Hint

   Think about the concept of balance.

2. 2.

   Define surface tension.

   Hint

   Consider why raindrops form spherical shapes.

3. 3.

   In equilibrium conditions, what must be true about the forces acting on a fluid?

   • A. They can be unequal.
   • B. They must be equal and opposite.
   • C. They have no effect on each other.

   Hint

   Think about how balance works.

4. 4.

   True or False: Surface tension is a dominant force in large-diameter tubes.

   • True
   • False

   Hint

   Consider the effects of surface area.

5. 5.

   Given a capillary tube of diameter 2 mm, calculate the height the water will rise if the surface tension is 0.072 N/m and the density of water is 1000 kg/m³.

   Hint

   Focus on calculating the effective radius from the diameter.

6. 6.

   If a tube has a contact angle of 30 degrees with water, how would this angle affect the height of rise compared to a 0 degree angle in practical applications?

   Hint

   Consider how angles influence capillarity in real-life scenarios.