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A to E of concepts

This is the first group of concepts that forms this section of the site called - the A to Z of concepts. It would be great to receive your comments and/or suggestions about any entries that you would like to see included. Latest updates will be recorded here: Last update: Rest of the “E” concepts added 26/10/25 A is for Acceleration, Addition, Angle and Atomic theory In everyday language, acceleration just means...

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