2.3. Conservation of Mass

Try these first

1. 1.

   Define the principle of conservation of mass.

   Hint

   Think about what happens to mass in a closed container.

2. 2.

   What is the Reynolds Transport Theorem?

   Hint

   Describe how mass and momentum are transferred through boundaries.

3. 3.

   What does the conservation of mass principle state?

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

   Hint

   Think about how balance within a container works over time.

4. 4.

   True or False: The Reynolds Transport Theorem applies only to mass conservation.

   • True
   • False

   Hint

   Consider other conservation principles in physics.

5. 5.

   A reservoir drains at a rate of 500 liters/min. Calculate how fast the water level drops in meters/min if the surface area of the reservoir is 1000 m².

   Hint

   Convert the flow rate to the correct unit first.

6. 6.

   A water pipe narrows from a diameter of 60cm to 30cm. If the velocity in the wider section is 2 m/s, what is the velocity in the narrower section?

   Hint

   Make sure to apply the area conversions accurately.