physical units
physical units Units used in measuring physical quantities. For example, the kilogram unit of mass is defined as the mass of a specified block of platinum. Other masses are measured by weighing them and comparing them, directly or indirectly, with this. Units are of two types: base units that, like the kilogram, have fundamental definitions; and derived units that are defined in terms of these base units. Various systems of units exist, founded on certain base units. They include Imperial units (foot, pound, second), CGS units (centimetre, gram, second), and MKS units (metre, kilogram, second). For all scientific purposes, SI units have been adopted.
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United Biscuits (Holdings) plc , u·nit / ˈyoōnit/ • n. 1. an individual thing or person regarded as single and complete, esp. for purposes of calculation: the family unit. ∎ each of… Metric System , metric system, system of weights and measures planned in France and adopted there in 1799; it has since been adopted by most of the technologically d… Si Units , SI units Systéme International d'Unités: the international system of units now recommended for all scientific purposes. A coherent and rationalized s… International System Of Units , The International System of Units (SI), which began as the decimal metric system during the French Revolution, deals with the definitions, terminolog… Svedberg Unit , Svedberg unit (S) The unit in which the sedimentation factor is expressed. It is equal to 10–13 seconds and is written with no space between the numb… pico- , pico- The Spanish pico, meaning ‘beak’ or ‘peak’ (i.e. a point), used as a prefix (symbol p) with SI units to denote the unit ×10−12.
pico- From the…
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physical units