A smarter way to study—free, fast, and comprehensive.
What is a Lens? A lens is conventionally defined as a piece of glass which is used to focus or change the direction of a beam of light passing through it.They are mainly made of glass or plastic. Lens are
Properties of waves – Waves exhibit various properties which can be conveniently demonstrated using the ripple tank. It consists of a transparent tray filled with water and a white screen as the bottom.– On top we have a source of
Pressure Laws – This law states that “the pressure of a fixed mass of a gas is directly proportional to the absolute temperature if the volume is kept constant”. The comparison between Kelvin scale and degrees Celsius is given by;θ0
Quantity of Heat –Heat is a form of energy that flows from one body to another due to temperature differences between them. Heat capacity Heat capacity is defined as the quantity of heat required to raise the temperature of a given mass
Introduction to Heating effect of an electric current – When current flows, electrical energy is transformed into other forms of energy i.e. light, mechanical and chemical changes. Factors affecting electrical heating Energy dissipated by current or work done as current
Electric fields – An electric field is the space around a charged body where another charged body would be acted on by a force. These fields are represented by lines of force.-This line of force also called an electric flux
Electric Potential Difference and Electric Current Electric current – Electric potential difference (p. d) is defined as the work done per unit charge in moving charge from one point to another. It is measured in volts.– Electric current is the rate of flow
Energy This is the ability to do work. Forms of energy a. Chemical energy: – this is found in foods, oils charcoal firewood etc.b. Mechanical energy: – there are four types; Transformation and conservation of energy – Any device that facilitates energy transformations is
Newton’s first law (law of inertia) – This law states that A body continues in its state of rest or uniform motion unless an unbalanced force acts on it.– Inertia is the property that keeps an object in its state of
Introduction to Refraction of Light Refraction is the change of direction of light rays as they pass at an angle from one medium to another of different optical densities Explanation: To investigate the path of light through rectangular glass block.Apparatus: –
What is Agriculture? Agriculture refers to a fundamental human activity, which i...
POPULATION STUDIES Is the general activities carried out for the purpose of acqu...
CONCEPT OF SOIL AND SOIL PROFILE Soil appears very complex and thus differe...
GROUND WATER WATER CYCLE Rain falls on the earth surface in filtrates (soaks int...
THEORIES THEORY OF ISOSTASY Denudation has been going on the continents where to...
GLOBE Is the model of the earth Earth Is ball of rock partly covered by wat...
Photograph are the true image pictures showing truly appearance of the earth’s...
What is a map? Map is a scaled conventional representation of the whole or any o...
INTRODUCTION TO SURVEYING Surveying is an art or a science of measuring and reco...
Definitions of Research – Research is the systematic investigation into a...
STATISTICS Statistics is a branch that deals with every aspect of the data. Stat...
