System of units
System of Units
The System of Units (pronunciation: /ˈsɪstəm ɒv juːˈnɪts/) is a comprehensive and standardized set of units of measurement used in science, commerce, and everyday life. The most widely used system of units is the International System of Units (SI), which is based on seven base units.
Etymology
The term "System of Units" is derived from the Latin word 'systema', meaning 'an organized scheme or method', and the Old French 'unité', meaning 'oneness, sameness, agreement'.
Related Terms
- Base unit: A fundamental unit that is defined arbitrarily and not derived from other units. Examples include the meter, kilogram, and second in the SI system.
- Derived unit: A unit that is defined in terms of base units. For example, the SI unit of force, the newton, is defined as kg·m/s².
- Dimensional analysis: A mathematical technique used to predict physical quantities by analyzing the dimensions of the units involved.
- Metric system: A decimal-based system of measurement that is the precursor to the SI system.
- Imperial system: A system of units used in the UK and other countries that were part of the British Empire, which includes units such as the pound, foot, and gallon.
See Also
External links
- Medical encyclopedia article on System of units
- Wikipedia's article - System of units
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