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Introduction: Oersted’s discovery – Hans Christian Oersted discovered the magnetic effect of a current in 1819.– The direction of the field is dependent on the direction of the current. Determining the Direction of the Lines of Force – The direction
Concave and Convex Mirrors -They are also known as spherical mirrors and are formed when a spherical glass is silvered.-If the inside is silvered a convex or diverging is formed while a concave or converging mirror is formed when the outside is silvered. Parts of a Spherical Mirror
Centre of Gravity – Centre of gravity or C.G is the point of balance of a body in which the total weight of the body seems to act. Practice Example 1 The figure below shows a uniform bar of weight
Turning Effects: Introduction – The turning effect of a body is called the moment of that force.– The turning effect produced depends on both the size of the force and the distance from the pivot.– The moment of a force
Measuring Length Using Vernier Callipers -Vernier callipers is used when higher accuracy in measurement is required and this cannot be done using a metre rule.– Vernier callipers has two scales; main scale and vernier scale. Outside jaws are used to measure both
Magnetism: Introduction – Magnets are substances that are able to attract and hold items. Magnets and Non-Magnetic Materials – Magnetic materials are those that are strongly attracted by magnets while non-magnetic ones are those that are not affected by magnets.–
Introduction to Pressure – It is defined as the force acting normally (perpendicularly) per unit area– The SI units for pressure is newton per metre squared (N/m² or Nm-2). – One Nm-2 is known as one Pascal (Pa). Formula for Pressure – pressure is
Measurement comprises of length, area, volume, mass, density and time. Universal System of Units is called system international d’ unites (International System of Units) – SI Units.Below are the major SI Units Basic Quantity SI Unit Symbol Length Metre m Mass Kilogram
Physics is a Greek word meaning nature hence it deals with natural phenomena. What is Physics? – Physics is therefore a science whose objective is the study of components of matter and their mutual interactions.– Physics is also defined as the
– At a school laboratory:– An acid may be defined as a substance that turn litmus red.– A base may be defined as a substance that turn litmus blue.– Litmus is a lichen found mainly in West Africa.– It changes its colour
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...
