CONTENT 1. The Concept of Fields 2. Types of Fields 3. Properties of a Force Field 4. Acceleration Due to Gravity 5. Determination of Acceleration Due to Gravity 6. The Shape and Dimension of the Earth
CONTENT 1. The Definition of Matter 2. Structure of Matter 3. Evidence of the Particle Nature of Matter 4. Experimental Evidence of the Particle Nature of Matter 5. Explanation of Brownian Motion 6. Simple Atomic Structure 7. The Nature and Size of Molecules
CONTENT 1. Molecules 2. Definition of Molecules 3. Structure, Nature and Size of Molecules 4. Some Ideas about Molecular Size 5. Estimating the Size of a Molecule 6. States of Matter 7. The Kinetic Molecular Theory of Matter 8. Fundamental Assumptions of the Kinetic Molecular Theory 9. Basic Assumptions of the Kinetic Theory of Gases 10. Characteristics of the Three States of Matter 11. Crystalline and Amorphous Substances 12. Crystals 13. Non-Crystalline and Amorphous Solids 14. Differences between Amorphous and Crystalline Substances
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)
CONTENT 1. Electric Current 2. Electric Circuit 3. Potential Difference 4. Electromotive Force 5. Resistance 6. Types of Resistors 7. Sources of Electric Current 8. Arrangement of Resistors 9. Ohm’s Law 10. Calculations
Basic Assumptions of the Kinetic Theory of Matter (Gases)
Basic Assumptions of the Kinetic Theory of Matter (Gases)
The attractions between molecules are negligible
The molecules of a gas are in a state of constant random motion, colliding with one another and the walls of their container
The collisions of the molecules are perfectly elastic
The duration of a collision is negligible compared with the time between collision
The molecules possess kinetic energy by virtue of their motion which is directly proportional to their temperature.
EVALUATION
Explain why the pressure of a gas at constant temperature increase with a decrease in the volume of the gas
What do you understand by diffusion?
Can diffusion take place in solids, liquids and gases? Explain
Explain these phenomena using the kinetic theory of matter: (a) Brownian motion (b) surface tension (c) osmosis
Consider at least four different liquids. E.g palm oil, ground nut oil, engine oil, e.t.c and test their degree of viscosity as was done earlier using a suitable ball bearing. Now answer these questions
In which liquid did the ball travel fastest?
Which liquid did the ball travel slowest?
Hence, list the liquids in their order of viscosity starting from the lowest to the highest.
Mention two other low viscous liquids and two other high viscous liquids.
