Chapter 2 Exercises 19
Chapter 2 Exercises 19 + 20: How to Arrange a Conversion Factor in a Fraction When Doing a Conversion
Introduction
This video covers exercises 19 and 20 from Chapter 2, focusing on how to arrange a conversion factor in a fraction when performing unit conversions. The presenter uses a practical example to illustrate the process, making it clear and understandable.
Main Points
- Understanding Conversion Factors
- Conversion factors relate two units using an equal sign (e.g., 24 hours = 1 day).
- Essential for converting quantities from one unit to another.
- Example Conversion: Hours to Days
- Given: 76 hours
- Find: How many days are in 76 hours
- Conversion Factor: 24 hours = 1 day
- Steps for Conversion
- Step 1: Write the given value with its unit (76 hours).
- Step 2: Write a multiplication sign and a fraction bar next to it.
- Step 3: Place the unit you want to cancel out (hours) in the denominator.
- Step 4: Place the unit you want to convert to (days) in the numerator.
- Step 5: Fill in the numerical values from the conversion factor (24 hours in the denominator, 1 day in the numerator).
- Key Concepts
- Denominator Unit: Place the unit you want to cancel out.
- Numerator Unit: Place the unit you want to be left with.
- Numerical Values: Cross the fraction bar as if crossing an equal sign (24 hours below, 1 day above).
Conclusion
The video clearly explains how to arrange conversion factors in fractions when doing unit conversions. By following these steps, viewers can accurately convert between different units, enhancing their understanding and application of conversion factors.