A C T ng Examples of ACT’ng : x 103

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Presentation transcript:

A C T ng Examples of ACT’ng : 800003 14.000 14.000 149700 9.999 x 103 ACT’ng on Numbers - Labeling the digits in a number to determin # of Sig Figs Acting Rules of Counting Significant Figures (Sig Figs or SF) A 1. ALL non-zero digits in a number are significant. 2. Captive zeros - zeros located between nonzero digits are significant. 3. Trailing zeros - zero at the end of a number having a decimal point are significant 4. Leading zeros - zeros that serve only to locate the position of the decimal point. Place holder preceding are NOT significant. C T ng ‘no good’ Examples of ACT’ng : 800003 14.000 AA TTT A CCCC total See if you can ACT on these giving ACT labels: 14.000 149700 total 9.999 x 103 0.3995

A C T! ng Examples of ACT!’ng : 800003 14.000 14.000 149700 ACT!’ng on Numbers - Labeling the digits in a number to determin # of Sig Figs Acting Rules of Counting Significant Figures (Sig Figs or SF) A 1. ALL non-zero digits in a number are significant. 2. Captive zeros - zeros located between nonzero digits are significant. 3. Trailing zeros - zero at the end of a number having a decimal point are significant 4. Leading zeros - zeros that serve only to locate the position of the decimal point. Place holder preceding are NOT significant. C T! ng ‘no good’ Examples of ACT!’ng : 800003 14.000 AA TTT A CCCC total See if you can ACT on these giving ACT labels: 14.000 149700 AA TTT AAAAngng 9.999 x 103 0.03995 ngng AAAA AAAA exponent is exactly

inaccurate but by chance; the result of the average of the three x’s ….and measurements will have to be made!!!! precise but inaccurate precise & accurate inaccurate but by chance; the result of the average of the three x’s will be accurate

D. Measured Values & Significant Figures (with certainty): supplemental HO 19 D. Measured Values & Significant Figures (with certainty): 12.7 ± 0.1 12.7, 12.6, 12.8 11.22 ± 0.01 11.22, 11.21, 11.23 11.135 ± 0.001 11.135, 11.134, 11.136