DimensionalAnalysis

DimensionalAnalysis - numerical uncertainty measurements...

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numerical uncertainty  - measurements are ALWAYS inexact   precision - how closely measurements agree w/ each other accuracy - how closely measurements agree w/ the right answer precision doesn't lead to accuracy trials are done to get a better accuracy significant figures  - all digits of a quantity, including an uncertain one   measured quantities are reported so that the last digit is uncertain more significant figures means more certainty in the measurement all non-zero digits are significant o 3456 - 4 significant figures o 3.13245 - 6 significant figures o 22 - 2 significant figures zeros between non-zero digits are significant o 34000005 - 8 significant digits o 345.0003 - 7 significant digits o 60.7 - 3 significant digits zeros at the beginning of the number aren't significant o 0.00000000006 - 1 significant digit o 0000234 - 3 significan digits o 0.0005042 - 4 signifcant digits zeros at the end of the number are significant
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This document was uploaded on 10/30/2011 for the course CHEM 161 at Rutgers.

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DimensionalAnalysis - numerical uncertainty measurements...

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