Perform the following conversion and report the answer to the
correct number of significant figures.
a) Determine the number of kilograms in 115 pounds might
require 2 unit conversion factors.
Answer
![](../../../1215F99/Lecture/Lectur9.gif)
If we knew the unit conversion factor
![](../../../1215F99/Lecture/Lectur10.gif)
The calculation could have been completed with
only one conversion.
![](../../../1215F99/Lecture/Lectur11.gif)
You do not need to memorize the conversion
between pounds and grams. I'll give that on the test. You do need
to know the number of grams in a kilogram.