define measurement and it's units
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Measurement is the assignment of a number to a characteristic of an object or event, which can be compared with other objects or events.
A unit of measurement is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard formeasurement of the same kind of quantity. Any other quantity of that kind can be expressed as a multiple of the unit of measurement. For example, a length is a physical quantity
A unit of measurement is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard formeasurement of the same kind of quantity. Any other quantity of that kind can be expressed as a multiple of the unit of measurement. For example, a length is a physical quantity
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measurement is the determination or estimation of ratios of quantities. Quantity and measurement are mutually defined: quantitative attributes are those possible to measure, at least in principle.The SI base units and their physical quantities are the metre for measurement of length, the kilogram for mass, the second for time, the ampere for electric current, the kelvin for temperature, the candela for luminous intensity, and the mole for amount of substance.
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