Chapter02 Measurements(Significant Figures) Lec-07 Learning Objectives Review Introduction to significant figures Rules of Significant figures Practice Questions Review Questions Significant Figures Only those figures or digits of a numerical quantity which are the result of actual measurement are said to be significant. Rules of Significant Figures Rule 01All non zeros are significant figuresExample.  3.14 Rule 2Zeros Between non zeros are significantExample 1001 Home Task Write the number of significant figures (1, 400, 12002,100.0, 0.0001,10x104, 150.000, 17000,1200.010, 1222.00, 111, 000, 1.000) Thank You For Your Cooperation Presentation On SlideShare “Significant Figures (Measurments) Lec 07”

1. Chapter02
Measurements
(Significant Figures)
Lec-07

2. Learning Objectives
• Review
• Introduction to significant figures
• Rules of Significant figures
• Practice Questions
• Review Questions

3. Significant
Figures

4. Only those figures
or digits of a
numerical quantity
which are the
result of actual
measurement are
said to be
significant.

5. Rules of
Significant
Figures

6. Rule 01
All non zeros are significant figures
Example.
3.14

7. Rule 2
Zeros Between non zeros are
significant
Example
1001

8. Rule 3
All zeros which locate in decimal
point less than one are non
significant
0.01660

9. Rule 4
All the zeros after the
decimal point are significant.
169.0000

10. Rule 5
Zeros after the non zero digits
are not significant
1500
1.5 km
1500 m
1.5 x102

11. Rule 6
In mathematical operations the number of
significant figures should be from minimum data
value.
Example. Area of a room is (9.8m)x(17.1m)
=167.58 m2
Round Off to 170

12. Practice Questions
1. 0.0020
2. 50002
3. 300
4. 40 x102
5. 100.00

13. Home Task
Write the number of significant figures
(1, 400, 12002,100.0, 0.0001,10x104,
150.000, 17000,1200.010, 1222.00, 111,
000, 1.000)

14. Thank You For Your
Cooperation
Presentation On SlideShare “Significant Figures (Measurments) Lec
07”