Solution: Answer to question 1: No work is done in this case. For work to be done a force must move its point of application a distance in the direction of the force. In this case, the man carried the child at the same position (no change in distance) through out the match.   Answer ….  Read More

Topic: Heat Energy Sub-topic: Concept of Heat and Temperature Date: 24/01/2022 LEARNING OBJECTIVES: i) Understand the concept of heat energy ii) Understand the effect of heat on various substances Concept of Heat and Temperature Heat is a form of energy called thermal energy. When we place a pot of cold water on a heating stove, ….  Read More

  Topic: Heat Energy Sub-topic: Kinetic Molecular Theory Date: 25/01/2022 LEARNING OBJECTIVES: i) Understand the fundamentals of the kinetic molecular theory ii) Explain Temperature using the kinetic molecular theory iii) Explain thermal expansion using the kinetic molecular theory   The molecular theory of matter assumes that matter is made up of atoms that aggregate in ….  Read More

  Topic: Heat Energy Sub-topic: Kinetic Molecular Theory Date: 26/01/2022 LEARNING OBJECTIVES: i) Understand the fundamentals of the kinetic molecular theory ii) Explain Temperature using the kinetic molecular theory iii) Explain thermal expansion using the kinetic molecular theory   Linear expansion The linear expansivity α of a substance is defined as the increase in length ….  Read More

Topic: Heat Energy Date: 31/01/2022 LEARNING OBJECTIVES: i) Understand the different applications of thermal expansion ii) Explain the anomalous expansion of water. Consequences and Applications of Thermal Expansion 1. Expansion in building and steel bridges: We often hear creaking noises by the galvanized iron sheets in the roof of buildings as the roof is being ….  Read More

Topic: Heat Energy Date: 01/02/2022 LEARNING OBJECTIVES: i) Explain change of state using and vaporization using the kinetic molecular theory. ii) Understand the different mechansism of heat transfer ii) Know with examples, the difference between good and bad conductors of heat Change of State: Matter exists in three states – solid, liquid, and gas. When ….  Read More

Answer 1. C – The blade is a better conductor of heat than the handle. 2. Fusion: Fusion is the change of state from solid to liquid under the application of heat.   3. Conduction, Convection and Radiation are the modes of heat transfer . Refer to your note for a brief explanation of conduction ….  Read More

  Topic: Heat Energy Date: 02/02/2022 LEARNING OBJECTIVES: i) Understand radiation as a mode of heat transfer. ii) know the different instruments used in detecting radiation ii) The working principle of a Thermos flask.   Radiation: Radiation is the process by which heat is transferred from a hotter to a cooler place without heating of ….  Read More

Topic: Electric Charges Subtopic: Production of charges Date: 07/02/2022 LEARNING OBJECTIVES: i) Understand what is meant by ‘electrostatics’. ii) Produce charges.   Electrostatics or static electricity is the type of electricity that does not move from one point to another in the substance in which it is produced. The study of electrostatics is the study ….  Read More

  Topic: Electric Charges Subtopic: Types of Charges Date: 08/02/2022 LEARNING OBJECTIVES: i) Identify the types of charges ii) Produce charges.     Types of Charges: There are two types of charges: positive and negative charges. When you rub a glass rod with silk the type of of electric charge produced is the positive charge. ….  Read More

Answers:   1. (d) some electrons have been transferred from glass to silk.   2. The conductors are Aluminium, Copper, and graphite.(they allow easy passage of electrons through them) Plastic, rubber, sulphur and ceramic materials are all insulators (they do not allow for easy passage of electrons through them)

    Topic: Electric Charges Sub-Topic: The Gold Leaf Electroscope Date: 09/02/2022 LEARNING OBJECTIVES: i) Understand what an electroscope is. ii) Construct a simple electroscope The Gold Leaf Electroscope: An electroscope is an instrument for the detection and testing of small electric charges. Its essential features are shown in the image attached to the lesson ….  Read More

  Topic: Electric Charges Sub-Topic: Production of charges Date: 28/02/2022 LEARNING OBJECTIVES: i) Understand the different methods of producing charges ii) Determine the type of charge on a body using an electroscope   Ways of producing charges There are three methods of producing charges: 1) By Friction (2) By contact (3) By Induction (1) By ….  Read More

  Topic: Electric Charges Sub-Topic: Lightning Conductors Date: 01/03/2022 LEARNING OBJECTIVES: i) Explain change of state using and vaporization using the ii) Construct a simple electroscope Distribution of charges on conductors: Experimental work shows that charges are usually concentrated at places where the surface is sharply curved. The charge per unit area of surface, or ….  Read More

Assignment/ 2nd C.A Subject : Physics Instruction: Answer all questions. (1.   Explain the working principle of a lightning conductor. (2    Explain why an ebonite robbed with fur attracts small pieces of paper. (3.    Explain how the construction of a Thermos flask reduces heat exchange with the surroundings. (4.   Why is the outer surface ….  Read More

Topic: Revision of Second term’s work Date: 04/05/2022 Work, Energy and Power: Work: We defined work as the product of the force and the displacement in the direction of the force. Its unit is the joule. Work(Joules)=Force(Newtons) × Displacement(metres) Work done in lifting a body and from a falling body is Work (W) = m ….  Read More

  Topic: Revision of Second term’s work Date: 09/05/2022 Concept of Heat and Temperature We established heat energy to be: is the energy that is transferred from a hot object to a cooler object as a result of their difference in temperature; and Temperature to be: the degree of hotness or coldness of an object. ….  Read More

Topic: Description and Property of Fields Sub Topic: Gravitational Field Date: 10/05/2022 LEARNING OBJECTIVES: 1. Explain the concept of force fields 2. Identify the force fields from a set of forces. 3. Explain why two bodies of different masses when released from rest at the same point simultaneously, fall to the ground at the same ….  Read More

  Topic: Description and Property of Fields Sub Topic: Magnetic Fields Date: 01/05/2022 LEARNING OBJECTIVES: Explain the concept of magnetism and magnetic fields. Magnets: If you put a bar magnet in a plate of iron fillings m on bringing out the bar magnet. It is noticed that the iron fillings cling to the magnet with ….  Read More

Answer to Evaluation: (1) Iron and steel pins. These are magnetic substance and therefore will experience a force when placed a magnetic field. Note: Steel is an alloy of Iron and Carbon. Therefore, it is a magnetic substance. 2. The poles of a magnet is the portion of magnet where its magnetic attraction appears to ….  Read More

Topic: Electric lines of force: Date: 16/05/2022 Learning Objective: 1. Understanding the concept of electric lines of force 2. Understanding the properties of electric lines of force. ELECTRIC LINES OF FORCE: An electric field is a region or space where a charged body experiences an electric force. The electric field is just a way of ….  Read More

Topic: Electric Field Sub Topic: Potential Difference and Electric Current Date: 17/05/2022 LEARNING OBJECTIVES: i) Understanding the electric circuit   When electric current are at rest it is referred to as static electricity. When the charges are in motion. It is referred to as current electricity. Electric current, I, is defined as the rate of ….  Read More

Solution: (1a) An electric circuit is the path provided for the flow of electric current. The circuit consists of the source of electric energy (e.g. a battery ) connected through a conductor (e.g. a wire) to a load (e.g. an electric bulb) and a key or switch. The switch serves to close or open the ….  Read More

Topic: Electric Field Sub Topic: Production of electric current Date: 18/05/2022 LEARNING OBJECTIVES: Understand the different ways electric current can be generated Electricity current can be generated from (a) chemical energy (b) heat energy (c) mechanical energy (d) solar energy a) Electricity from chemical energy Electricity is produced from chemical energy through the use of ….  Read More

Topic: Electric Field Sub Topic: Conductors and Insulators Date: 23/05/2022 LEARNING OBJECTIVES: Distinguish between conductors and insulators.   All materials offer a certain degree of opposition or resistance to the flow of current through them. Some materials allow currents to flow through them more easily than others. Materials through which electricity can flow easily are ….  Read More

Topic: Electric Field Sub Topic: Connection of resistors in an electric circuit Date: 24/05/2022 LEARNING OBJECTIVES: (i Understand the different methods of connecting resistors in an electric circuit. Resistance can be defined as the opposition to the flow if charges (electrons) or current. Its unit is the ohm. Parallel and Series Connection of resistors in ….  Read More

Solution: (1) 1/R = 1/R1 + 1/R2 + 1/R3 1/R =1/3 + 1/3 + 1/3 1/R = 1/1 1/R =1 ⸫ R = 1/1 R = 1.0 ohm Therefore the equivalent resistance of the combination is 1.0 ohm. (2) The connection was mode was not specified the, the resistors can ne combined in series or ….  Read More

Topic: Electric Field Sub Topic: Factors affecting electrical resistances Date: 25/05/2022 LEARNING OBJECTIVES: Understanding the factors affecting electrical resistance.   Factors affecting electrical resistances Factors affecting the electrical resistances of a conductor are: (1) Length of Conductor (2) Area of conductor (3) Temperature and (4) Type or substance of material (1) Length: The resistance of ….  Read More

Topic: Electric Field Sub Topic: Electric Work Date: 30/05/2022 LEARNING OBJECTIVES: I. Calculate the electrical work done in a given circuit. II. Convert electric energy into mechanical energy, heat energy, light energy and sound energy. Electrical Work Done in a given circuit Work is done when electricity flows from one point to another of different ….  Read More

  Solution: 1. Electric energy can be converted to heat in electric irons, electric kettles. Hot plates etc Electric energy can be converted to Light energy in the glow of filaments lamps or bulbs. Electric energy can be converted to mechanical energy in the blades of electric fans, washing machines, electric graters etc. 2. The ….  Read More

Topic: Electric Field Sub Topic: Heating effect of current/ chapter review Date: 01/06/2022 LEARNING OBJECTIVES: 1.Understand the heating effects of current. 2. Topic review. Heating Effect of Current When electric current flows through a conductor the resistance of the conductor changes electrical energy into heat energy just as friction changes mechanical energy into heat. It ….  Read More

  Topic: Particulate nature of matter Sub Topic: Structure of matter Date: 06/06/2022 LEARNING OBJECTIVES: Give evidence as to the particulate nature of matter. State the constituents of the atom. Evidence of the particulate nature of matter The idea that matter is made up of minute particles called atoms dates back to the ancient Greeks. ….  Read More

Topic: Particulate nature of matter Sub Topic: Molecules Date: 07/06/2022 LEARNING OBJECTIVES: 1. Give evidence as to the particulate nature of matter. 2. State the constituents of the atom. Most substances cannot exist by themselves as individual atoms. They combine their atoms with themselves or with other atoms to form molecules. A molecules is the ….  Read More

Topic: Particulate nature of matter Sub Topic: States of matter Date: 08/06/2022 LEARNING OBJECTIVES: Use molecular theory to explain the three states of matter. State the constituents of the atom. Matter can exist in three states – solids, liquids and gases. Solids: The molecules that constitute a solid are very closely packed. They are very ….  Read More

Solution 1. Answer D – Molecules of a liquid are stationary 2. Answer D – A proton 3. (a) Separation of the molecules Solids: The molecules are very closely packed (i.e. they are not separated). They are very held together by intermolecular forces of cohesion. The molecules are anchored to fixed positions but can vibrate ….  Read More

  Topic: Elastic properties of Solids Sub Topic: Hooke’s law Date: 04/06/2022 LEARNING OBJECTIVES: Explain the elastic properties of substances State Hooke’s law.     If the electrical force applied to a solid is strong enough to change the shape of a solid, the solid tends to regain this shape as soon as the applied ….  Read More

Topic: Elastic properties of Solids Sub Topic: Date: 15/06/2022 LEARNING OBJECTIVES: Show understanding of such terms as: Stress, strain, elastic limit, young’s modulus. Solve simple problems on work done in stretching or compressing a spring and elastic strings     Young’s Modulus: Let a wire of length l(m) and cross-sectional area A (m2) be extended ….  Read More

  1. W = ½Fe = ½ke2 If W = ½Fe and W = ½ke2 ⸫ ½Fe = ½ke2 Given k= 1500 N/m e = ? F = 75N   ½ × 75×e = ½ × 1500 × e2 37.5e = 750e2 37.5e/e = 750e2/e 37.5 = 750e 37.5/750 = 750e/750 0.05 = e e ….  Read More

YHWH YESHUA HAMASCHIAC S.S.S.1 summer/spring term, Physics Lesson 18, 2021/2022. Topic: Fluids at rest and in Motion Sub Topic: Date: 20/06/2022 LEARNING OBJECTIVES: 1.   Define surface tension in liquids 2.   Show understanding as to the applications of the effects surface tension The molecules of liquids and gases are more free to move than those of ….  Read More

Topic: Fluids at rest and in Motion Sub Topic: Capillarity Date: 21/06/2022 LEARNING OBJECTIVES: Understand the phenomenon of capillarity. Capillarity When we drop three tubes with fine bores but with different diameters into a clean water, we observe that the water rises in the tubes but the narrower the bore the higher the height to ….  Read More

Topic: Fluids at rest and in Motion Sub Topic: Viscosity Date: 22/06/2022 LEARNING OBJECTIVES: Understand the phenomenon of viscosity. Viscosity- Friction in Fluids It is observed that it is easier to pour water or kerosene from a container than to pour honey or engine oil. A liitle stone dropped into a cylinder of water gets ….  Read More

Continuous Assessment Test Subject: Physics Date: 05/07/2022 Instruction: Answer any four questions.     (1a)             What do you understand by the poles of a magnet? Using a magnet of known poles, how can you differentiate between the two poles of another magnet? (b)     What are electric lines of force? Gives four properties of field lines. ….  Read More

YHWH YESHUA HAMASCHIAC Summer/Spring term Examination Subject: Physics                                                              Session: 2021/2022 Class: SSS1                                                                    Time: 2hrs Date:   SECTION A: Instruction: Answer all questions by selecting the correct option in each case. What is the unit for electrical charges (a) Newton (b) Ampere (c) Ammeter (d) watt (e) none of the above What is electrical energy measured ….  Read More