Significant Figures

6,162 views
5,832 views

Published on

1 Comment
4 Likes
Statistics
Notes
  • Wow: this slide show has made my job easy.
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
No Downloads
Views
Total views
6,162
On SlideShare
0
From Embeds
0
Number of Embeds
34
Actions
Shares
0
Downloads
409
Comments
1
Likes
4
Embeds 0
No embeds

No notes for slide

Significant Figures

  1. 1. Significant Figures
  2. 2. Significant Figures <ul><li>All measurements are inaccurate </li></ul><ul><ul><li>Precision of measuring device </li></ul></ul><ul><ul><li>Human error </li></ul></ul><ul><ul><li>Faulty technique </li></ul></ul>
  3. 3. Significant Figures <ul><li>Measurements need to convey precision </li></ul><ul><li>Must include degree of uncertainty </li></ul><ul><li>Sig Figs tell us </li></ul>
  4. 4. Significant Figures
  5. 5. Significant Figures <ul><li>Significant figures in a measurement include </li></ul><ul><ul><li>all of the digits that are known precisely </li></ul></ul><ul><ul><li>plus one last digit that is estimated . </li></ul></ul>
  6. 6. Significant Figures <ul><li>2. Non-zero digits are always significant. </li></ul><ul><li>1 0 3 . 23 000 2 </li></ul>
  7. 7. Significant Figures <ul><li>3. All final zeros after the decimal point are significant. </li></ul><ul><li>12.74 0 </li></ul><ul><li>0.042 0 </li></ul>
  8. 8. Significant Figures <ul><li>4. Zeros between two other significant digits are always significant. </li></ul><ul><li>1 0 .0 </li></ul><ul><li>2 00 4 </li></ul><ul><li>6. 00 0 </li></ul>
  9. 9. Significant Figures <ul><li>5. Zeros used only for spacing the decimal point are not significant . </li></ul><ul><li>1 00 </li></ul><ul><li>0.00000 233 </li></ul>
  10. 10. Killing Babies <ul><li>Always put a 0 in front of a decimal point </li></ul><ul><ul><li>0.247  </li></ul></ul><ul><ul><li>0.0042  </li></ul></ul><ul><ul><li>.873  </li></ul></ul>
  11. 11. Significant Figures
  12. 12. Significant Figures 1)   400   2)    200.0 3)    0.0001 4)    218 5)  320   6)    0.00530 7)    22 568 8) 4755.50 
  13. 13. Significant Figures 1)   4.0 x 10 3       2)    1.67 x 10 -8 3)    5 x 10 12    4)    2.00 x 10 4 5)  635.000 6)   22 000 7)    5201 8)    81 
  14. 14. Significant Figures <ul><li>6. If you add or subtract, the answer is rounded to the same number of decimal places as the measurement with the least number of decimal places. </li></ul>
  15. 15. Significant Figures <ul><li>7. If you multiply or divide two numbers, the answer is rounded off to the number of significant figures in the least precise term used in the calculation (i.e. the number with the fewest sig figs). </li></ul>
  16. 16. Calculations
  17. 17. Calculations

×