Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our Privacy Policy and User Agreement for details.

Successfully reported this slideshow.

Like this presentation? Why not share!

No Downloads

Total views

7,696

On SlideShare

0

From Embeds

0

Number of Embeds

361

Shares

0

Downloads

0

Comments

7

Likes

1

No notes for slide

- 1. FACTOR LABEL METHOD & CONVERSION FACTORS
- 2. FACTOR LABEL METHOD• A method of converting units from one form to another. • Must have a conversion factor to perform factor label method that is arranged so that like units cancel.• Significant figures still matter • Our final answer will have the same # of sig figs as the number we are converting
- 3. CONVERSION FACTOR • Used to convert a measured quantity to a different unit of measure without changing the relative amount. • It is a ratio (fraction) that equals one • Examples: • 1 inch = 2.54 cm => 1 inch/2.54cm • Aka a bridge • See first page in text for unit conversion factors
- 4. EXAMPLE: LET’S START OFF EASY…• Let’s say we want to find out how many centimeters are in 21.5 inches1. Identify information wanted & information given 21.5 inches = ?? Centimeters2. Identify unit conversion(s) to be used 2.54 cm = 1 inch3. Arrange conversion factor as shown: **only true if our desired units do not have a unit in the denominator** Desired units Original units4. Multiply the numbers in the numerator, and the numbers in denominator5. Divide the numerator by the denominator
- 5. FACTOR LABEL METHOD • Converting 21.5 inches to centimeters: • Conversion Factor: 2.54 cm 1.00 in.
- 6. EXAMPLE: LET’S MAKE THINGS A BITTRICKIER…• Ex: how many hours are there in 7200 seconds? 1. Identify information wanted & information given 7200 sec. = ?? hours2. Identify unit conversion(s) to be used 60 sec = 1 min 60 min = 1 hour3. Arrange conversion factors as shown: Desired units Original units4. Multiply so that units cancel
- 7. FACTOR LABEL METHODEx: how many hours are there in 7200 seconds?1. 7200 sec. = ?? hours2. 60 sec = 1 min 60 min = 1 hour3 & 4. 7200 sec. x 1 min x 1 hour = 2 hrs 60 sec 60 min
- 8. EXAMPLE: YOUR TURN!Try this one: How many inches are in 1.00 miles?1. Identify information wanted & information given2. Identify unit conversion(s) to be used1. Arrange conversion factor as shown: Desired units Original units4. Multiply so that units cancel
- 9. EXAMPLEHow tall are you…- In inches?- In meters?- In miles?
- 10. EXAMPLE: CONVERTING RATES• What is 65 miles per hour converted to feet per second? • NOTE: the word “per” identifies that there is a ratio • Rewrite as 65 miles and feet hour sec
- 11. EXAMPLE: THE MORE DIFFICULT STUFF!What is 65 miles per hour converted to feet per second?1. Identify information wanted & information given1. Identify unit conversion(s) to be used1. Arrange conversion factors so that desired units are left2. Multiply so that units cancel
- 12. FACTOR LABEL METHOD • This method can also be used to convert between metric unit prefixes • Ex: how many meters are in 52 cm? 52 cm x 1.0 m = 0.52 m 100 cm • You should memorize all metric conversions from kilo through milliprefix mega kilo hecto Deka Deci Centi Milli micro Meter Gram Value 106 103 102 101 Second 10-1 10-2 10-3 10-6 Liter mAbbrev- g M k h da d c m μ (“mew”) iation s

No public clipboards found for this slide

Login to see the comments