1. YOYO: Write the following in scientific notation 3450000 0.000000012
Write the following in standard form
8.923 x 106
0.002 x 10-3
x 104
x 10-2

2. YOYO: Write the following in scientific notation 3450000  3.45 x 106
Write the following in standard form
8.923 x 106 
2.0 x 10-3 
x 104 
x 10-2 

3. AIM: What is dimensional analysis?
Scanlon

4. Dimensional Analysis
Dimensional analysis, (aka Factor-Label Method, or Unit Factor Method) is a problem-solving method that uses the fact that any number or expression can be multiplied by one without changing its value. It is a very useful technique we will be using all year long!

5. Unit Factors/Conversion Factors
Unit factors, or conversion factors, may be made from any two terms that describe the same or equivalent “amounts” of what we are interested in

6. Useful Conversion Factors
1 inch = 2.54 cm
5280 feet = 1 mile
3 feet = 1 yard
1 yard = 1.09 meters
60 seconds = 1 minute
60 minutes = 1 hour
24 hours = 1 day
days = 1 year
1 liter = 1000 milliliters
101.3 kPa = 1 atm *

7. 1 Equivalent Amount  2 Unit Factors
1 inch = 2.54 centimeters
1 inch centimeters
2.54 centimeters inch

8. How many centimeters are in 6.00 inches?
Write what you are starting with
Determine what you want to end up with
Look to see what conversion factors might be useful
Multiply by the conversion factor
Check to see that all units EXCEPT for what you want to end up with will cancel out. If not, flip the conversion factor
Plug into a calculator and get your answer. Make sure to use proper significant figures
Double check to make sure you have ended up with the correct units, and everything else was canceled out.
6.00 inches
Inches  cm
1 inch = 2.54 cm
6.00 in cm in
5. See above cm
7. See above

9. How many seconds are in 1 year
1 yr 1
60 sec
1 min
days
1 year
24 hours
1 day
60 mins
1 hour
(1)(365.25)(24)(60)(60) =
31,557, 660 seconds

10. Practice Time
Work on the first 4 problems in the DIMENSIONAL ANALYSIS PRACTICE section in your HW packet (page 4)