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Transcript of Dimensional Analysis
Scientist and Physicist use it to see the relationships between two or multiple sets of data. They would also use it to make reasonable hypotheses. *little bit of history: This same method was used by Isaac Newton, but he called it the Great Principle of Similitude When and where do I use it? Just because you know what it is does, does not mean you know the proper times to use it. Dimensional analysis would not be used to add two plus two, but it could be used if you want to know how many centimeters there are in a yard.
If you are going to use dimensional analysis in chemistry class you need to know
1. What data and units are given to start the problem?
2. What quantity is needed as an answer?
3. What conversion factors are available to go from the given data to the answer? Tools you may need to solve your problem Conversions, your stair way through the metric system and time, can be used to figure it out.
1ine = 2.54 cm k h da b c m
Decide from what units to what other units you want to go to.
Today we are going from yds to cm. 12 yds ?cm Step three Plug it in.
When you are going dimensional analysis you are canceling units to get to units. When you place the units in your chart you want them to be diagonal from each other. yds ft yds in ft in cm Step four Plug the numbers into the chart. Make sure that your conversions are correct and that they are inputted correctly 12yds 3ft 1 yd 12in 1ft 2.54cm 1in Step 5 Multiply across the top and the bottom then divide.. and
This is your final answer and it is way easier to use in chemistry :) 1,097 cm d da