Conversion Factor What is a conversion factor A conversion factor is a fraction whose numerator and denominator represent the same quaintly but use different units Thus the fraction is equal to 1 ID: 652090
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Slide1
Conversion Factors
Objective: Learn to use one or more conversion factors to solve rate problems.Slide2
Conversion Factor
What is a conversion factor?
A conversion factor is a fraction whose numerator and denominator represent the same quaintly
but
use different units.
Thus the fraction is equal to 1.
Slide3
Example:
RIGHT?
RIGHT?
And so on…Slide4
Helpful Hints:
The conversion factor:
Must introduce the desired unit
Must cancel the original unit so that the desired unit is all that remains
The original unit must be on the opposite side of the conversion fraction. Slide5
Converting Between Metric and Customary Units
1 inch is 2.54 cm. A bookmark has a length of 18 cm. What is the length of the bookmark in inch rounded to the nearest inch?
Write the proportion
Find the cross product
Solve for x
Round to nearest inch
The bookmark is
about
7 inches long. Slide6
Finding Conversion Factors
feet to
yards
There are 3 feet in 1 yard.
To
convert feet to yards, multiply the number of
feet by
pounds to ouncesThere are 16 ounces in 1 pound. To convert pounds to ounces, multiply the number of pounds by
Find the appropriate factor for each conversion.
Remember we need the units in the denominator to cancel. Slide7
Try This!
Find the appropriate factor for each conversion.
Kilometers to centimeters
Inches to yards
Hours to weeks
Multiply the number of km by this
Multiply the number of in by this
Multiply the number of
hrs
by thisSlide8
Example 1:
The average American uses 580 pounds of paper per year
. Find
the number of pounds of paper the average
American uses
per month, to the nearest tenth.Slide9
Example 2
:
Use a unit conversion factor to convert the units?
If orange juice sells for $1.28 per gallon, what is the cost per ounce?
Convert 80 miles per hour to miles per minutes. Slide10
Example 3:
A strobe lamp can be used to measure the speed of
an object
. The lamp flashes every
of a second. A
camera records the object moving 52 cm between flashes. How fast is
the object moving in m/s?