20.4. Steady Flow Across Missions

Try these first

1. 1.

   What is the definition of momentum?

   Hint

   Think about how mass and speed relate to movement.

2. 2.

   What does a control volume represent?

   Hint

   This term is often used in fluid mechanics for analysis.

3. 3.

   What does conservation of momentum imply in fluid systems?

   • Total momentum is constant if no external force acts.
   • Total momentum always increases.
   • Total momentum can never decrease.

   Hint

   Consider a closed system.

4. 4.

   Momentum flux correction factors are necessary for which of the following?

   • True
   • False

   Hint

   Think about how velocity variations affect calculations.

5. 5.

   A water jet is directed at a surface at a 30-degree angle. Calculate the force exerted on the surface if the jet has a momentum flow rate of 100 kg/s.

   Hint

   Consider how angles affect vector components.

6. 6.

   Analyze the momentum change in a control volume with an inlet velocity of 5 m/s and an outlet velocity of 3 m/s. Assume a density of 1,000 kg/m³.

   Hint

   Remember to factor in the densities when calculating momentum.