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Sig Fig, Sci Not, F/L

Sig Fig, Sci Not, F/L. Examples. Mass and weight are different. Mass is the amount of matter in an object Weight is a measure of the gravitational pull on matter. What is the difference between accuracy and precision ?

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Sig Fig, Sci Not, F/L

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  1. Sig Fig, Sci Not, F/L Examples

  2. Mass and weight are different. • Mass is the amount of matter in an object • Weight is a measure of the gravitational pull on matter.

  3. What is the difference between accuracy and precision? Accuracyis closeness of a measurement to the correct or accepted value. Precisionis the closeness of a set of measurements to the same quantity made in the same way. • Shooting an M-16 requires accuracy and precision.

  4. *Qualitative words, colors, *Quantitative numbers

  5. Sig. Fig. Rules • Zeros appearing b/non zero digits are sign. • Zeros appearing in front of non zero digits are NOT signif. • Zeros at the end of a # and to the right of a decimal are signif.

  6. 1. 30110 4 2. .0015 2 3. .0109 3

  7. 4. 10. 05 4 5. 1.30 X 103 3 • 2.4 X 10-2 2

  8. 7. 5.205 X 106 4 8. 1.03 X 10-4 3 • (2.0) (.0103) = .0206 .021

  9. 10. (5013) / (1.0) = 5013 5.0 X 103

  10. F/L Method • Write what you know • F/L parentheses • Cancel unit -- and fill in the open spot in the parentheses • Put a 1 by whatever is bigger • Make a true statement in the parantheses

  11. 11. 12 cm  m .12 12. .01 mm  m .00001 or 1e-5

  12. 102 cm  km .00102 km • 65 mL  kL .000065 kL or 6.5 e -5 • 23 mile/ 30min  mile/hr 46 mile/hr

  13. 17 mile/ 10min  mile/ hr 102 mile/hr 17. 100m/9.69sec  mile/ hr 23.08 mile/hr 18. 120 yds  m 109.73

  14. 16 can pop  cases .67 cases • 14 yrs old  sec 441, 504, 000

  15. Reading Graduated Cylinders • Identify graduation scale • Get eye level with the liquid • Read to the bottom of the meniscus • Estimate to one decimal place you can’t see • http://www.wisc-online.com/objects/viewobject.aspx?id=gch302

  16. Reading a Meter Stick

  17. Reading an Electronic Balance

  18. Try these!!! • 23 mL --> L • 15 Km --> mm • 2.13 X 103 --> • 7.1 X 10-2 --> • 6300 --> Sci Not • .00103 --> Sci Not • .0010 --> sig fig • 20100 --> sig fig • 10.04 --> sig fig • 0.01 --> sig fig

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