2.5. Examples of Conservation of Mass

Try these first

1. 1.

   Define conservation of mass in your own words.

   Hint

   Think about the implications for a closed system.

2. 2.

   What is a control volume?

   Hint

   Consider its role in fluid mechanics.

3. 3.

   What does the conservation of mass state?

   • Mass can be created
   • Mass can be destroyed
   • Mass remains constant

   Hint

   Think about system boundaries.

4. 4.

   The continuity equation relates which two parameters?

   • True
   • False

   Hint

   Consider mass flow rate principles.

5. 5.

   A tank holds 1000 L of water. If water flows out at a rate of 5 L/s, how long will it take for the tank to empty?

   Hint

   Use total volume divided by outflow rate.

6. 6.

   Design an experiment to demonstrate conservation of mass using a closed system.

   Hint

   Consider all inflow and outflow.