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FLUIDS AT REST AND IN MOTION

CONTENT

  1. Properties of Fluids at Rest
  2. Definition and Effects of Surface Tension
  3. Experiment to Demonstrate Surface Tension
  4. Methods of Reducing Surface Tension
  5. Effects of Surface Tension
  6. Capillarity
  7. Definition of Capillarity
  8. Illustration of Capillarity
  9. Demonstration of Capillary Action
  10. Explanation of Capillarity
  11. Cohesive and Adhesive Forces
  12. Diffusion of Gases
  13. Osmosis
  14. Viscosity
  15. Terminal Velocity
  16. Applications of Surface Tension and Viscosity
  17. Basic Assumptions of the Kinetic Theory of Matter (Gases)

 

Properties of Fluids at Rest

Definition and Effects of Surface Tension

Surface tension can be defined as the force per unit length normal or perpendicular to a line on the surface of a liquid.

Surface tension exists because of the molecular attraction between the liquid molecules. Consider a vessel of water with molecules P and Q as shown in the figure below

 

Molecular Forces in a Liquid

Molecule Q is attracted by equal number of molecules all around and so it is in a state of equilibrium.

Lesson tags: Physics Lesson Notes, Physics Objective Questions, SS1 Physics, SS1 Physics Evaluation Questions, SS1 Physics Evaluation Questions Third Term, SS1 Physics Objective Questions, SS1 Physics Objective Questions Third Term, SS1 Physics Third Term
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