States of matter Matter is anything that occupies space. Matter exists in three states: solids, liquids and gases. Matter can be changed in various ways which includes physical, chemical and nuclear changes. a) Physical changes– they are normally reversible and no new substances formed. Examples are; (i) Change of state such as melting and vaporization […]
PARTICULATE NATURE OF MATTER Read More »
Force is a push or a pull. Force is therefore that which changes a body’s state of motion or shape. The SI unit for force is Newton (N). It is a vector quantity. It is represented by the following symbol. Types of forces Gravitational force–this is the force of attraction between two bodies of
MEASUREMENT.
In order to measure we need to know or define the quantity to be measured and the units for measuring it.
In 1971 a system known as the International System of Units (Systeme’ Internationale) and seven basic units were agreed upon as follows. Other quantities can be obtained from these basic quantities and are referred to as derived quantities.