conversion problems 3.3
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Conversion Problems 3.3. Conversion Problems. 3.33. Because each country’s currency compares differently with the U.S. dollar, knowing how to convert currency units correctly is very important. Conversion problems are readily solved by a problem-solving approach called dimensional analysis. - PowerPoint PPT PresentationTRANSCRIPT
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Conversion Problems 3.3
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3.33
Conversion Problems
Because each country’s currency compares differently with the U.S. dollar, knowing how to convert currency units correctly is very important. Conversion problems are readily solved by a problem-solving approach called dimensional analysis.
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Conversion Problems >
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Conversion Factors
Conversion Factors
What happens when a measurement is multiplied by a conversion factor?
3.3
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Conversion Problems >3.3 Conversion Factors
A conversion factor is a ratio of equivalent measurements.
The ratios 100 cm/1 m and 1 m/100 cm are examples of conversion factors.
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Conversion Problems > Conversion Factors
Animation 3
Learn how to select the proper conversion factor and how to use it.
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Conversion Problems >3.3 Conversion Factors
When a measurement is multiplied by a conversion factor, the numerical value is generally changed, but the actual size of the quantity measured remains the same.
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Conversion Problems >3.3 Conversion Factors
The scale of the micrograph is in nanometers. Using the relationship 109 nm = 1 m, you can write the following conversion factors.
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Conversion Problems >
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3.3 Dimensional Analysis
Dimensional Analysis
Why is dimensional analysis useful?
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Conversion Problems >3.3 Dimensional Analysis
Dimensional analysis is a way to analyze and solve problems using the units, or dimensions, of the measurements.
Dimensional analysis provides you with an alternative approach to problem solving.
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SAMPLE PROBLEM
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3.5
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SAMPLE PROBLEM
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SAMPLE PROBLEM
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SAMPLE PROBLEM
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Practice Problems
Problem Solving 3.29 Solve Problem 29 with the help of an interactive guided tutorial.
for Sample Problem 3.5
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SAMPLE PROBLEM
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SAMPLE PROBLEM
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SAMPLE PROBLEM
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SAMPLE PROBLEM
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Practice Problems
For Sample Problem 3.6
Problem Solving 3.30 Solve Problem 30 with the help of an interactive guided tutorial.
for Sample Problem 3.6
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Conversion Problems >
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Converting Between Units
Converting Between Units
What types of problems are easily solved by using dimensional analysis?
3.3
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Conversion Problems > Converting Between Units
Problems in which a measurement with one unit is converted to an equivalent measurement with another unit are easily solved using dimensional analysis.
3.3
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SAMPLE PROBLEM
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SAMPLE PROBLEM
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Practice Problems for Sample Problem 3.7
Problem Solving 3.33 Solve Problem 33 with the help of an interactive guided tutorial.
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Conversion Problems > Converting Between Units
Multistep Problems
When converting between units, it is often necessary to use more than one conversion factor. Sample problem 3.8 illustrates the use of multiple conversion factors.
3.3
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SAMPLE PROBLEM
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SAMPLE PROBLEM
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SAMPLE PROBLEM
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SAMPLE PROBLEM
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Practice Problems for Sample Problem 3.8
Problem Solving 3.35 Solve Problem 35 with the help of an interactive guided tutorial.
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Conversion Problems >3.3 Converting Between Units
Converting Complex Units
Many common measurements are expressed as a ratio of two units. If you use dimensional analysis, converting these complex units is just as easy as converting single units. It will just take multiple steps to arrive at an answer.
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Practice Problems for Sample Problem 3.9
Problem-Solving 3.37 Solve Problem 37 with the help of an interactive guided tutorial.
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Section Quiz
-or-Continue to: Launch:
Assess students’ understanding of the concepts in Section
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Section Assessment
3.3
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1. 1 Mg = 1000 kg. Which of the following would be a correct conversion factor for this relationship?
a. 1000.
b. 1/1000.
c. ÷ 1000.
d. 1000 kg/1Mg.
3.3 Section Quiz
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3.3 Section Quiz
2. The conversion factor used to convert joules to calories changes
a. the quantity of energy measured but not the numerical value of the measurement.
b. neither the numerical value of the measurement nor the quantity of energy measured.
c. the numerical value of the measurement but not the quantity of energy measured.
d. both the numerical value of the measurement and the quantity of energy measured.
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3.3 Section Quiz
3. How many g are in 0.0134 g?
a. 1.34 10–4
b. 1.34 10–6
c. 1.34 106
d. 1.34 104
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3.3 Section Quiz
4. Express the density 5.6 g/cm3 in kg/m3.
a. 5.6 106kg/m3
b. 5.6 103kg/m3
c. 0.56 kg/m3
d. 0.0056 kg/m3
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