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Significant Figures

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Jason Reyerson

on 3 September 2010

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Transcript of Significant Figures

Significant Figures Significant figure are important because they describe the precision with which measuremens were made. Rule #1
All nonzero digits are significant. 12 has 2 sig. figs. 65.3 has 3 sig. figs. 13,486.5 has 6 sig. figs. Rule #2
All zeros inbetween nonzeros or other significant zero are significant. 1001 has 4 sig. figs. 10,209 has 5 sig. figs. 1,000,000,001 has 10 sig. figs. Rule #3
All zeros after the decimal point AND after a nonzero are significant. 11.00 has 4 sig. figs. 2.310 has 4 sig. figs. 1.23000 has 6 sig. figs 100.0 4 sig. figs. 0.10030 5 sig. figs. 2004.003400 10 sig. figs. 0.000 403 3 sig. figs. 2000 1 sig. fig. 0.000 405 000 6 sig. figs. 1,000,000,000 1 sig. fig. + or -
Your answer will only be as precise as the measurement the has the least precision
(what is the placeholder of the last sig. fig.) x or /
Your answer will have the same number of sig. figs. as the measurement with the fewest sig. figs. 10.0 + 17.00 = 27.0 100 - 5 = 100 12.00 x 10.0000 = 120.0 15.64 x 2 = 30
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