1 / 20

SIGNIFICANT FIGURES

SIGNIFICANT FIGURES. What are significant figures??. The number of meaningful or reliable digits in a measurement. How to identify significant figures??. Rule 1. All nonzero digits are significant Example: 199  85 967 . 3 significant figures. 5 significant figures. Rule 2.

penelope-lyons
Télécharger la présentation

SIGNIFICANT FIGURES

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. SIGNIFICANTFIGURES

  2. What are significant figures?? • The number of meaningful or reliable digits in a measurement

  3. How to identify significant figures??

  4. Rule 1 • All nonzero digits are significant Example: 199  85 967  3 significant figures 5 significant figures

  5. Rule 2 • All zeros between 2 nonzero digits are significant Example: 235 001 10 000 009  6 sig figs 8 sig figs

  6. Rule 3 • All zeros before the first nonzero digit are not significant Example: 001234  0.00075  0.01201  4 sig figs 2 sig figs 4 sig figs

  7. Rule 4 • All zeros to the right of a decimal point and a nonzero digit are significant Example: 0.200 0.03210  9.8060  800.00  3 sig figs 4 sig figs 5 sig figs 5 sig figs

  8. Rule 5 • All zeros to the left of an unexpressed decimal point are not significant Example: 300  9900.  10100  1 sig fig 4 sig figs 3 sig figs

  9. Stretch your muscles and have an… EXERCISE!

  10. How many sig figs are there? • 56986  • 102  • 0.3900  • 8400  • 0.0047  5 sig figs 3 sig figs 4 sig figs 2 sig figs 2 sig figs

  11. How many sig figs are there? • 1 090  • 0056.01  • 0.980100  • 4.00  • 0.010000  3 sig figs 4 sig figs 6 sig figs 3 sig figs 5 sig figs

  12. How many sig figs are there? • 1400  • 2100.  • 630.01  • 9.00  • 0.0501  2 sig figs 4 sig figs 5 sig figs 3 sig figs 3 sig figs

  13. Doing mathematical operations… • Addition and Subtraction • the number of decimal places in the answer is equal to the number of decimal places in the quantity with the smallest number of decimal places Example: 1.01 + 3.111 = 0.333 + 100.3 = 4.12 100.6

  14. Doing mathematical operations… • Multiplication and Division • the number of significant figures in the final answer should be equal to the least number of significant figures in any of the given data Example: (2.50) (2.0) = (1000)(5.00) = 5.0 5000

  15. Quiz Bee II

  16. Q1 How many significant figures are there in this number??? 1 000 080 6 sig figs!

  17. Q2 Add: 999.90 + 0.1 = 1000.0

  18. Q3 How many significant figures are there in this number??? 9.0080100 8 sig figs!

  19. Q4 Multiply! (25)(1000) = 25 000

  20. Q5 Divide..  999 / 3.000 = 333

More Related