4. Conclusion

Try these first

1. 1.

   Define the continuity equation.

   Hint

   Think about conservation of what?

2. 2.

   What does momentum conservation relate to in fluid dynamics?

   Hint

   What happens to force and velocity?

3. 3.

   What does the continuity equation state?

   • Mass flow in equals mass flow out
   • Mass can be created
   • Only liquids are covered

   Hint

   Think about fluid entering and leaving a system.

4. 4.

   Is momentum conservation a basic principle in fluid mechanics?

   • True
   • False

   Hint

   Does it relate energy to motion?

5. 5.

   A pipe tapers from 0.5 m to 0.25 m. If water flows at 1 m/s in the larger diameter, what is the velocity in the smaller diameter?

   Hint

   Think about how areas compare.

6. 6.

   If water flows through a horizontal pipe, how would you calculate the force applied if the water exits at 10 L/min and impacts a wall, assuming it comes to a complete stop?

   Hint

   Remember to relate mass flow and velocity to force.