Unit #1Unit #2Unit #3Unit #4Unit #5Unit #6Unit #7Unit #8Unit #9Unit #10
spacerUNIT # 1  
spacerspacerIntroduction
spacerspacerObjectives
spacerspacerReading

spacer1.1
Metric
spacerSystem
spacerSI System
spacerBritish System

spacer1.2 Temperature
spacerMeasure-
spacerments

spacer1.3 Scientific
spacerNotation

spacer1.4 Dimensional
spacerAnalysis

spacer1.5 Precision,
spacerAccuracy,
spacerUncertainty

spacerLimitation of the Measuring Instrument
spacerAnalysis of the Limitation of a Ruler
spacerAnalysis of the Limitation of another Ruler
spacer1.6 Significant
spacerFigures

spacerThe Magnitude and Reliability of the Measurement
spacerFive Rules for Determining the number of Significant Figures in a Measurement

spacer1.7 Calculations
spacerInvolving
spacerSignificant
spacerFigures
spacerRules for Rounding off Numbers
spacerRules for Addition  and Subtraction

spacerRules for Multiplication and Division

spacer1.8 Density
spacerDensity and Temperature
spacer1.9 Specific
spacerGravity
spacerspacerProblems
spacer1 | 2 | 3
   

MEASUREMENT

1.6 - Significant Figures

1.6.2 - Five Rules for Determining the number of Significant Figures in a Measurement  

RULES (Significant figures are the figures in red)
Rule 1. All nonzero integers are significant. eg - 456 cm 456 cm
has 3 significant figures
Rule 2. All zeros to the left of the first nonzero digit are not significant since they are used to locate the decimal point. eg - 0.00567 kg 0.00567 kg
has 3 significant figures
Rule 3. All zeros between nonzero digits are significant. eg 1 - 207.08 cm 207.08 cm
has 5 significant figures
  eg 2 - 0.0401 L 0.0401 L
has 3 significant figures
Rule 4. All zeros at the end of a number that has a decimal point are significant. eg 1 - 34.070 mg
34.070 mg
has 5 significant figures
  eg 2 - 0.0670 g 0.0670 g
has 3 significant figures
  eg 3 - 400. mm 400. mm
has 3 significant figures
Rule 5. Zeros at the end of a whole number that has no decimal point is confusing since they may or may not be significant. eg - 300 L ??????? The measurement, "300 L", as written is confusing.

Section 2.5
Significant Digits ..p21

 

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