Dimensional Analysis

Dimensional Analysis PowerPoint PPT Presentation


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Dimensional Analysis. What happens when you divide a number by itself?What happens when you divide a unit by itself?In both cases, you get the number 1. Dimensional analysis involves multiplication and division. Focus on cancelation of UNITSJust another method of unit conversion. First- learn t

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Dimensional Analysis

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1. Dimensional Analysis

2. Dimensional Analysis What happens when you divide a number by itself? What happens when you divide a unit by itself? In both cases, you get the number 1. Dimensional analysis involves multiplication and division. Focus on cancelation of UNITS Just another method of unit conversion

3. First- learn the metric prefixes http://www.essex1.com/people/speer/large.html You should memorize: Kilo 1 x 103 base units or 1000 base units So 1 km = 1000 m Centi 1 x 10-2 base units or 0.01 base units So 1 cm = 0.01 m OR 100 cm = 1 m Milli 1 x 10-3 base units or 0.001 base units So 1 mm = 0.001 m OR 1000 mm = 1m Be able to use a chart for the others! On the chart, use 1 with the prefix. Use the other number with the base unit (L, m, g)

4. Conversion factors To convert between units: Figure out what CONVERSION FACTOR you need to perform your calculation Conversion factors – take a definition and turn it into a fraction equal to one – for example: There are 12 inches in 1 foot 12 inches or 1 foot 1 foot 12 inches

5. Examples of dimensional analysis

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