Sunday, January 15, 2012

Unit

The process of measurement involves a numerical value associated with a standard reference terms. For example, measurement of mass involves kilogram associated with numerical value i.e. 1kg, 5kg, 10kg etc. So, kilogram is the unit of mass. Likewise meter is the unit of length, second is the unit of time, newton is the unit of force, watt is the unit of power etc. Thus, unit is a standard reference quantity of a substance in terms of which a physical quantity can be measured. The unit of a physical quantity is the most convenient amount of that quantity. Different physical quantities have different units for their measurement.
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