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Chemistry, industry and the environment A chemical industry is one that uses chemistry to make chemicals from other substances (raw materials). Each of these basic industrial materials is produced…
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Dams and energy production What is a dam? A dam is a man made structure built across a river. Most dams are built to control river flow, improve navigation,…
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Elastic properties of solids Hooke’s law: states that provided the elastic limit is not exceeded, the extension, e, in an elastic material (e.g. wire) is proportional to the load…
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Electric field I: charges (A) Electric force and Coulomb’s law F= KeQ1Q2 / d2 Where Ke is a proportionality constant and is written as 1/4π£0 where £0 is called…
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Electric field II: Current Electricity (A) Electric current A current is any motion of charge from one point to another in conducting materials. Current is donated by I, therefore…
