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DIMENSIONAL ANALYSIS

DIMENSIONAL ANALYSIS. A CONVERSION “MUST KNOW”!! IT’S ALL THE RAGE!. A DIMENSIONAL ANALYSIS “HOW TO”. Dimensional analysis is a way of making conversions and solving problems using equivalent units. In this process, we use conversion factors that equal 1. Directions:.

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DIMENSIONAL ANALYSIS

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  1. DIMENSIONAL ANALYSIS A CONVERSION “MUST KNOW”!! IT’S ALL THE RAGE!

  2. A DIMENSIONAL ANALYSIS “HOW TO” • Dimensional analysis is a way of making conversions and solving problems using equivalent units. In this process, we use conversion factors that equal 1.

  3. Directions: • = • Convert 345 cg to kg • Put the GIVEN unit on the top left. If it is a single unit (cm) put a 1 as the denominator on the bottom. If it is a derived unit (g/cm3), put the denominator unit on the bottom. • Next, use conversion factors (statements equal to 1) that link your given to what you need to find. Sometimes it will take more than one step.

  4. Write your conversion factor so that its units will cancel with the previous unit (diagonal to the same unit before it). • If the given is a derived unit you may need more than one conversion factor. For example, if you are converting mi/hr to km/sec you need to convert miles to kilometers and hours to seconds. It doesn’t matter which you do first.

  5. Before doing the math, cancel all units that you can cancel. You should be left with the unit(s) you are trying to find. If your conversion factors are correct and you put numbers in the calculator correctly, you will get the correct answer. If you do not end up with the correct units, the set-up is incorrect.

  6. FINALLY • PLUG & CHUG • Enter numbers and operations in your calculator and round the answer to the appropriate number of sig figs!

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