Something you must know before starting studying Physics
In the development of physics it turned out again and again how difficult, but also important it was to develop the most suitable concepts and find the relevant quantities (e.g. force or energy) in terms of which nature can be described both simply and comprehensively.Every physical quantity consists of a a measured value and a measuring unit, i.e. a pure number and a dimension. All difficulties in conversations are avoided, if we treat both parts like a product “value times dimension”. Insert: Denotations: It is an accepted thing in international physics for long time past to abbreviate as many of the physical quantities as possible by the first letter of the corresponding English word, e.g. s(space), t(time), m(mass), v(velocity), a(acceleration), F(force), E(energy), p(pressure), R(resistance), C(capacity), V(voltage), T(temperature), etc.. Of course there are some exceptions from this rule: e.g. momentum p, angular momentum l, electric current I or potential V. ...
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