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John Bransby is a former principal and examiner and is currently a Maths and...
primary particles: electrons, protons and neutrons.
the phase change of a substance from the solid phase directly into the gas phase without passing...
reactions in which an atom or group of atoms is replaced in a molecule by another atom or group...
single superphosphate fertiliser (SSP) is manufactured by adding sulfuric acid to phosphate...
adhesive (sticky) and elastic, tending to gather together in drops rather than spread over a...
heterogeneous mixture of solid particles mixed with a liquid. The solid does not dissolve in the...
Synchronous motors spin at a rate equal to the frequency of the AC mains.
a chemical reaction in which two or more chemicals combine to form a more complex product.