Dimensional Analysis - When doing calculations we always...

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When doing calculations we always write each number with its associated units. As you do the calculation the  units should cancel so that the final number you calculate also has the correct units. Let's look at some  examples. Donuts cost $2.79 a dozen. How much do 3 dozen donuts cost? Convert 0.34 cm to mm (micrometers). In these two examples the conversion factors are exact numbers. That is, they have infinite precision.  Conversions factors, however, are not always exact numbers. Let's look at an example using 
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This note was uploaded on 10/13/2011 for the course CHEMISTRY 121 taught by Professor Staff during the Fall '10 term at Bangladesh University of Eng and Tech.

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Dimensional Analysis - When doing calculations we always...

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