The Physics
Opus in profectus

Unit Conversion

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Factor-Label Method

Paraphrase this for an intro…

To investigate any physical phenomena, we must make measurements, communicate them to others, and record them in a way that will be understandable in the future. To do so, a system of quantities and units is required. Measurement is a comparison process in which the value of a quantity is expressed as the product of a value and a unit; that is,

{quantity} = {numerical value} × {unit}

where the unit is an agreed-upon value of a quantity of the same type. The concept of a quantity such as length is independent of the associated unit; the length is the same whether it is measured in feet or meters. A standard is a physical realization of the definition, with an agreed-upon value to be used as a reference.

Jeff Flowers—2004

Dimensional Analysis