Üldiselt peetakse läbimõõtu, ümbermõõtu ja lainepikkust sama liiki suurusteks, nimelt suuruse liigiks, mida nimetatakse pikkuseks, ka soojust, kineetilist energiat ja potentsiaalset energiat sama peetakse sama liiki suurusteks, nimelt suuruse liigiks, mida nimetatakse energiaks. Suurusi jõumoment ja energia ei vaadelda leppeliselt sama liiki suurustena, kuigi neil on sama dimensioon ja sama kehtib soojusmahtuvuse ja entroopia, aga ka osiste arvu, suhtelise magnetilise läbitavuse ja massiosa korral.
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Termin “suurus” jaotus kooskõlas “suuruse liikidega” on teatud määral suvaline. Antud suuruste süsteemis on kõigil sama liiki suurustel sama dimensioon, seevastu sama dimensiooniga suurused ei tarvitse olla sama liiki.
The quantities diameter, circumference, and wavelength are generally considered to be quantities of the same kind, namely of the kind of quantity called length. The quantities heat, kinetic energy, and potential energy are generally considered to be quantities of the same kind, namely of the kind of quantity called energy. The quantities moment of force and energy are, by convention, not regarded as being of the same kind, although they have the same dimension. Similarly for heat capacity and entropy, as well as for number of entities, relative permeability, and mass fraction.
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The division of the concept of "quantity" according to "kind of quantity" is to some extent arbitrary. Quantities of the same kind within a given system of quantities have the same quantity dimension. However, quantities of the same dimension are not necessarily of the same kind.
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