1. Warm – up #3 Place in the proper sig figs1)
2)3.15 x 2.5 x 4.00
3)36 / 0.62 4) 5)

2. Scientific Notation
In scientific notation, a number is written as the products of two numbers:
a coefficient and some power of 10

3. Scientific Notation Continued
The general form for scientific notation is:
M x 10n where
M is  1 but < 10
n is an integer and exponent
{integers must be a positive or negative whole number}

4. Complete the following calculations
1. (2.4 x 10-3) - (1.2 x 10-2)
2. (7.4 x 10-8) / (3.4 x 104)
3. ( 3.45 x 104) * (2.3 x 103)
4. (3.6 x 105) + (7.82 x 104)

5. Express the following scientific notations in the long form

6. Factor Label
Factor Label (Dimensional Analysis): a problem solving method based on manipulating units to solve problems
Factor Label uses conversions factors

7. Conversion Factors
Conversion factor: ratio derived from the equality of two different units serving to convert from one unit to the other

8. Conversion Factors Examples of Conversion Factors:
1 minute = 60 seconds
$1 = 4 quarters
1 year = 365 days

9. Conversion Factors Length: 1 meter = 1.094 yards 2.54 cm = 1 inch
1 mile = 5280 feet
1 mile = km
1000 m = 1km
100 cm = 1 m

10. Conversion Factors Continued
Mass:
1 kg = 2.2 lbs
453.6 g = 1 lb
1 ton = 2000 lbs
1 metric ton = 1000 kg
1 lb = 16 ounces
1000 g = 1kg

11. Volume:
1 L = 1.06 quarts
1 ft3 = L
1 L = 1 dm3
1 gallon = 4 quarts
1 gallon = 8 pints
1 quart = 32 fluid oz.
1 cm3 = 1 mL
1000 L = 1 m3

12. SI Conversion Factors (MUST KNOW)
1 kilo______ = 1, 000 _________
1 ________ = 100 centi__________
1 ________ = 1,000 milli__________
1_________ = 1,000,000 micro________
1_________ = 1,000,000,000 nano______
blank = gram, liter, meter 12

13. Tips for Solving Problems
1. Read problem carefully
2. Pick out important information (usually numbers are very important)
3. Determine what you are trying to find
4. Choose which steps you may have to use to determine your solution
5. Work the problem
6. Check the problem to see if your answer is reasonable
Begin 4th , 5th

14. = 1 minute 3.90945 min 60 seconds Example Problem 234.56 seconds
How many minutes are in seconds?
1 minute =
seconds
min
60 seconds
Answer is only to “5” sig figs so minutes is final answer

15. Practice for your Notes
If Johnny ran 50 feet, how many meters did he run?
Zachary studied chemistry for hours last year. How many seconds did he study?

16. Practice
35 fl oz to quarts
5.8 x 109 miles to kilometers
Being 9

17. Practice
Convert 67 meters to feet?

18. Practice . Convert 234 pounds to ounces
. Convert days to seconds

19. Examples
How many nanometers are in 425 meters?

20. Multistep Factor Label
How many cubic meters (m3) are in
500.0 cubic millimeters (mm3)?
500.0 mm3
(1m)3 m3
(1000 mm)3
Answer should have 4 sig figs
5.000 x 10-7 m3

21. Practice
Nolan Ryan threw a baseball with a velocity of miles/hr. Calculate the velocity in meters per second.
Ans) m/sec 21