1 / 7

Daily Science (August 25)

Daily Science (August 25). Put the following numbers into scientific notation: 209000000 (6 zeroes) 0.0000000231 (7 zeroes) 9.54 0.023 Perform the following calculations (no calc.) (6x 10 -2 ) x (3 x 10 -7 ) (4 x 10 3 ) / (8 x 10 8 ) (2.5 x 10 -8 ) x (3 x 10 11 ). Sig Figs. Pg. 15.

jasmine-kaufman
Download Presentation

Daily Science (August 25)

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. Daily Science (August 25) • Put the following numbers into scientific notation: • 209000000 (6 zeroes) • 0.0000000231 (7 zeroes) • 9.54 • 0.023 • Perform the following calculations (no calc.) • (6x 10-2) x (3 x 10-7) • (4 x 103) / (8 x 108) • (2.5 x 10-8) x (3 x 1011)

  2. Sig Figs Pg. 15

  3. Significant Figures • Scientists need to express the accuracy of a number, not just the value • Can determine accuracy by number of significant figures

  4. Rules for significant figures • All digits 1-9 are significant - ex. 946 has 3 sig. figs. • Zeroes between digits are significant -ex. 102 has 3 sig .figs. • Zeroes at the end of a number are significant ONLY if there is a decimal point. - ex. 300 has 1 sig. fig. but 300.0 has 4 sig. figs. • Zeroes in the beginning of a number whose function is to place the decimal point are NOT significant. -ex. 0.0031 has 2 sig. figs. • Zeroes following a decimal and digit 1-9 are significant. - ex. 0.0210 has 3 sig. figs or 0.2600 has 4 sig. figs.

  5. Sig. Figs. Example • How may sig. figs. does 103,400 have? • How many does 0.00351 have?

  6. Counting Sig. Figs. during operations • When multiplying or dividing: • Find the number with the least amount of sig. figs. • Round your answer to express that many sig. figs. • When adding or subtracting: • Find the number with the least amount of numbers after the decimal place • Round your answer to express that many decimal places

  7. Ex. • 1.76 x 2.1 • 141.02 + 32.1 + 26.345

More Related