2.2. Observations from Japan

Try these first

1. 1.

   Define equilibrium in fluid mechanics.

   Hint

   Think of the balance of forces.

2. 2.

   What does surface tension do in a liquid?

   Hint

   Consider how droplets form.

3. 3.

   What defines equilibrium in fluid mechanics?

   • Upward force is greater than downward force
   • Upward force equals downward force
   • There is only upward force
   • There is only downward force

   Hint

   Think about balance.

4. 4.

   Is surface tension significant only in small quantities of water?

   • True
   • False

   Hint

   Consider why raindrops are round.

5. 5.

   A narrow tube shows water rising due to surface tension. Calculate the height to which water rises given the surface tension of water is 0.072 N/m, the radius of the tube is 0.5 mm, and the density of water is 1000 kg/m^3.

   Hint

   Consider how surface tension affects height.

6. 6.

   Discuss the long-term effects on society when cultural practices, such as diary-keeping, are solidified in education.

   Hint

   Reflect on examples from your own life.