4. Electricity in practice
4.1 Principle of electricity
The matter around us is made up of atoms and molecules, which determine the specific properties of each substance. These substances can be pure simple bodies, such as copper or iron, or compound bodies resulting from the combination of different simple bodies.
The molecule is the smallest part of a pure substance that can exist while retaining the characteristics of that substance. It is made up of atoms, which themselves are composed of a...
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Electricity in practice
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