2.1.3. Capillarity Height and Angle of Contact

Try these first

1. 1.

   What is capillarity?

   Hint

   Think of how liquids behave in narrow tubes.

2. 2.

   Define surface tension.

   Hint

   Consider what happens at the surface of a water droplet.

3. 3.

   What determines the height of capillarity in narrow tubes?

   • Surface tension
   • Gravity
   • Fluid density

   Hint

   Think about what allows water to rise in a thin straw.

4. 4.

   True or False: A larger diameter necessarily leads to a higher capillary rise.

   • True
   • False

   Hint

   Consider the differences between using a straw or a wide glass.

5. 5.

   Calculate the height to which water will rise in a capillary tube with a radius of 0.5 mm and surface tension of 0.072 N/m at an angle of contact of 30 degrees.

   Hint

   Ensure you convert all units to SI before substituting.

6. 6.

   Discuss the implications of different liquid densities on capillary rise in various environments, providing examples.

   Hint

   Consider real-life applications where the context may involve varying densities.