Electromagnetism is the study of the effects caused by stationary and moving electric charges. MAGNETISM Pieces of some metallic ores, su...
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Showing posts with label Science. Show all posts
Showing posts with label Science. Show all posts
Electric Current
In the late 1790s, Count Alessandro Volta made the first battery. The first practical primary cell (non-rechargeable) was produced by John ...
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Atomic Theories
John Dalton revolutionized science in 1803 when he hypothesized that atoms of different chemical elements, such as hydrogen and oxygen, had...
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The Elements
It was Lavoisier who produced the first fairly reliable list of elements. However, it contained substances which had not, up to that time, ...
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States of Matter
Matter can exist in three states - solid, liquid or gas (vapour). Virtually all substances are able to exist in more than one of these thre...
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Organic Chemistry
Organic chemistry derives its name from the once-held belief that organic compounds could only be produced through living (organic) source...
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Modern chemistry
Modern chemistry is the study of the building blocks of matter and the fundamental units of chemistry are elements. There are about 90 nat...
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Chemical Reactions
Chemical reactions occur all the time - when fuels are burnt, in the industrial extraction of metals from their ores, and in many natural l...
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The Kinetic Theory Of Matter
When a red hot piece of iron cools down, it transfers energy to its surroundings in three possible ways: conduction, convection or radiatio...
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The Four Fundamental Forces
The interactions between matter can be explained by four forces: Gravitational:The weakest of the four forces, the gravitational force is ...
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States of Matter
Gases: Gases are readily compressible by a factor up to one thousand, showing that there must be large spaces between the molecules. The mo...
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Special And General Theories Of Relativity
Special theory of relativity was formulated by Einstein. SPECIAL RELATIVITY The special theory of relativity states that nothing can exce...
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Radioactivity
Radioactivity was gradually understood in terms of the disintegration of atomic nuclei. The three types of radiation are alpha decay, beta ...
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Nuclear Fission And Fusion
Otto Hahn and Fritz Strassman (1902-80) discovered nuclear fission in 1938. When an isotope of uranium-235 was bombarded with neutrons, it ...
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Motion And Mechanics
Motion And Mechanics KINEMATICS Kinematics covers a broad range of topics, from bodies falling to earth, to the description of bodies movi...
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Measurement Units
Acre:A measure of land, 4,840 square yards (4,046 square metres). Ampere:Unit for measuring the strength of an electric current. It is the...
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Introduction to Physics
Physics is the study of the basic laws that govern matter. Physics covers the science of the very large, and includes the study of bodies i...
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Heat and Work
Modern physics sees heat as energy collectively possessed by the particles making up a gas, liquid or solid. A body which possesses energy ...
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The Milky Way Galaxy
Our galaxy is considered to be a typical spiral galaxy about 75,000 light years in diameter. It is a member of the so-called ‘Local Group’ ...
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