4.. Mass Conservation Equation

Try these first

1. 1.

   What does the mass conservation equation state?

   Hint

   Think about fluids entering and exiting a system.

2. 2.

   What is the significance of incompressible flow?

   Hint

   Consider how this affects flow rate equations.

3. 3.

   What must be true about mass in a closed system?

   • It increases over time
   • It decreases over time
   • It remains constant

   Hint

   Think about the system boundaries.

4. 4.

   In what type of flow does density change?

   • Incompressible flow
   • Compressible flow

   Hint

   Consider scenarios like gases under pressure.

5. 5.

   A jet of water hits a flat plate at a velocity of 20 m/s and an area of 0.02 m². Calculate the force exerted by the jet.

   Hint

   Use the mass flow rate formula.

6. 6.

   Explain the design considerations for a spacecraft thrust system based on the mass conservation principles.

   Hint

   Think about how fuel consumption rates affect momentum.