HO1%20Math%20review

# HO1%20Math%20review - GLY 4822/GLY 6934 Hydrogeology Math...

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Source: http://www.rickly.com/HS/hydraulicconversion.htm , last accessed 12/9/10

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SIGNIFICANT FIGURES For measured numbers, significant figures relate the certainty of the measurement. As the number of significant figures increases, the more certain the measurement. The means for obtaining the measurement also becomes more sophisticated as the number of significant figures increase. Scientific notation is the most reliable way of expressing a number to a given number of significant figures. In scientific notation, the power of ten is insignificant. For instance, if one wishes to express the number 2000 to varying degrees of certainty: 2000 2 x 10 3 is expressed to one significant figure 2000 2.0 x 10 3 is expressed to two significant figures 2000 2.00 x 10 3 is expressed to three significant figures 2000 2.000 x 10 3 is expressed to four significant figures What do these numbers imply as to the certainty? Let's see what the number can be distinguished from: The number 2000 to one significant figure lies between: 1 x 10 3 = 1000 2 x 10 3 = 2000 3 x 10 3 = 3000 It is a number that lies between 1000 and 3000 -- not very certain, is it. The number 2000 to two significant figures lies between:
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HO1%20Math%20review - GLY 4822/GLY 6934 Hydrogeology Math...

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