Sig Fig, Sci Not, F/LSig Fig, Sci Not, F/L

Examples

• Mass and weight are different.

•Mass is the amount of matter in a object

•Weight is a measure of the gravitational pull on matter.

What is the difference between accuracy and precision?

AccuracyAccuracy is closeness of a measurement to the correct or accepted value.

PrecisionPrecision is the closeness of a set of measurements to the same quantity made in the same way.• Shooting an M-16 requires accuracy and

precision.

*Qualitative

words, colors,

*Quantitative

numbers

Sig. Fig. RulesSig. Fig. Rules

1. Zeros appearing b/non zero digits are sign.

2. Zeros appearing in front of non zero digits are NOT signif.

3. Zeros at the end of a # and to the right of a decimal are signif.

1. 30110

4

2. .0015

2

3. .0109

3

4. 10. 05

4

5. 1.30 X 103

3

6. 2.4 X 10-2

2

7. 5.205 X 106

4

8. 1.03 X 10-4

3

9. (2.0) (.0103) =

.0206

.021

10. (5013) / (1.0) =

5013

5.0 X 103

F/L MethodF/L Method

1. Write what you know2. F/L parentheses 3. Cancel unit -- and fill in the open

spot in the parentheses4. Put a 1 by whatever is bigger5. Make a true statement in the

parantheses

11. 12 cm m

.12

12. .01 mm m

.00001 or 1e-5

13. 102 cm km

.00102 km

14. 65 mL kL

.000065 kL or 6.5 e -5

15. 23 mile/ 30min mile/hr

46 mile/hr

16. 17 mile/ 10min mile/ hr102 mile/hr

17. 100m/9.69sec mile/ hr23.08 mile/hr

18. 120 yds m109.73

19. 16 can pop cases

.67 cases

20. 14 yrs old sec

441, 504, 000

Reading Graduated CylindersReading Graduated Cylinders

Identify graduation scaleGet eye level with the liquidRead to the bottom of the meniscusEstimate to one decimal place you

can’t seehttp://www.wisc-online.com/objects/

viewobject.aspx?id=gch302

Reading a Meter StickReading a Meter Stick

QuickTime™ and aTIFF (Uncompressed) decompressor

are needed to see this picture.

Reading an Electronic BalanceReading an Electronic Balance

QuickTime™ and aTIFF (Uncompressed) decompressor

are needed to see this picture.

QuickTime™ and aTIFF (Uncompressed) decompressor

are needed to see this picture.

Try these!!!Try these!!!

1. 23 mL --> L2. 15 Km --> mm3. 2.13 X 103 -->4. 7.1 X 10-2 --> 5. 6300 --> Sci Not6. .00103 --> Sci Not7. .0010 --> sig fig8. 20100 --> sig fig9. 10.04 --> sig fig10. 0.01 --> sig fig