Fluid Mechanics Quiz
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Questions and Answers

What is the study of fluid in motion called?

  • Conservation of mass
  • Law of conservation of energy
  • Fluid statics
  • Fluid dynamics (correct)

    • What does the law of conservation of mass state?

  • No atoms are created or destroyed in a chemical reaction (correct)
  • Matter can be converted from one form to another
  • The total mass of products is less than the total mass of reactants
  • Matter can be created or destroyed in a chemical reaction

    • What is the law of conservation of energy related to?

  • The creation of new energy
  • The conservation of mass
  • The conservation of momentum
  • The transformation of energy from one form to another (correct)

    • What is the characteristic of a moving object that is related to its mass and velocity?

    <p>Momentum</p> Signup and view all the answers

    What happens to energy in a chemical reaction?

    <p>It is transformed from one form to another</p> Signup and view all the answers

    What is the concept of 'conservation' related to?

    <p>The conditions before and after an event</p> Signup and view all the answers

    What is the unit of momentum?

    <p>kilogram * meter per second</p> Signup and view all the answers

    Why is it harder to stop a car moving at 20 m/s compared to a baseball moving at the same speed?

    <p>The car has a greater mass</p> Signup and view all the answers

    What determines the amount of momentum an object has?

    <p>Both velocity and mass</p> Signup and view all the answers

    What is the principle that states that the total momentum of an isolated system stays constant?

    <p>Conservation of Momentum</p> Signup and view all the answers

    What type of flow is characterized by the movement of fluid along parallel stream lines with uniform flow velocities?

    <p>Laminar flow</p> Signup and view all the answers

    What is the force that acts directly upon every element of the fluid?

    <p>Gravity</p> Signup and view all the answers

    Study Notes

    Fluid Mechanics

    • Fluid mechanics is the study of fluids (liquids and gases) at rest or in motion.
    • Fluid dynamics is the study of fluids in motion, while fluid statics is the study of fluids at rest.

    Conservation in Physical Science

    • Conservation means saving resources and refers to the conditions before and after an event.

    Law of Conservation of Mass

    • Atoms are neither created nor destroyed in a chemical reaction; they only combine in different ways to form products.
    • The total mass of the products is equal to the total mass of the reactants.

    Law of Conservation of Energy

    • Energy can neither be created nor destroyed, but can be transformed from one form to another.
    • Three statements summarize the law:
      • Energy cannot be created.
      • Energy cannot be destroyed.
      • Energy can only be converted from one form to another.

    Momentum

    • Momentum is a characteristic of a moving object, related to its mass and velocity.
    • Momentum (P) is calculated by multiplying mass (m) and velocity (v): P = m × v.
    • The unit of momentum is kilogram-meters per second (kg × m/s).
    • Momentum has both magnitude and direction, similar to velocity and acceleration.
    • The more momentum an object has, the harder it is to stop.
    • Both mass and velocity affect an object's momentum.

    Conservation of Momentum

    • The total momentum of an isolated system remains constant, meaning the total momentum before a collision equals the total momentum after a collision.
    • In the absence of outside forces, the total momentum of interacting objects does not change.

    Forces Acting on a Fluid

    • Gravity is a body force that acts directly on every element of the fluid.
    • Pressure is a force per unit area that acts perpendicular to the surface of the control volume.
    • Viscous forces are shear stresses arising from the viscous nature of fluids and local gradients of velocity.

    Fluid Flow

    • Laminar flow is characterized by uniform flow velocities and parallel streamlines.
    • Turbulent flow involves multiple directions and velocities, with different velocities in the Doppler curve.

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    Description

    Test your understanding of fluid mechanics, including fluid dynamics and statics, and the law of conservation of mass in chemical reactions.

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