Dimensional Analysis: Question Preview (ID: 22947)


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Which ratio would allow you to convert from 45 cm into feet?
a) 1 inch/2.54 cm....because cm would cancel out b) 2.54 cm/1 inch...because cm would cancel out c) 1 inch/2.54 cm...because feet would cancel out. d) 2.54 cm/1 inch...because cm would cancel out.
How do you get units (or numbers) to cancel out?
a) They are matched side by side. b) They are multiplied. c) There is a match on the top and bottom of the fraction d) They are both on the bottom of the fractions.
If there is a number on the top of a fraction and a number on the bottom of the fraction.....
a) You clearly have a multiplication problem. b) Obviously you have a cross multiplication problem. c) Most definately you have to square the top and bottom d) You certainly must divide the top by the bottom number.
To convert from 500 seconds to minutes you would use....
a) 60 seconds/1 minute b) 1 minute/60 seconds c) 60 minutes/1 second d) 1 second/60 minutes
Dimensional analysis is a method used to....
a) make kids really mad. b) cure mental illness. c) convert from one unit into another unit. d) torture mankind.
In order to cancel units.....
a) you need two matches in your numerator. b) you need a match on top and bottom. c) you need to scratch out whatever you want. d) you need to multiply in the correct order.
Why do you suppose we put our starting number and unit over 1?
a) because it's in the Bible. b) to make it into a fraction c) to make more work for kids. d) to give it one leg to stand on.
The final units of your answer in a dimensional analysis problem are located.....
a) on the top of your final conversion. b) on the bottom of your final conversion c) on the top of your starting number and unit. d) completely made up.
When multiplying fractions you should:
a) multiply all numbers no matter where their location is. b) multiply numbers on top and divide by the numbers on the bottom. c) cross multiply all numbers. d) cancel out all numbers to make it easy to deal with.
1000 mL is equal to ___________.
a) 1 Liter b) 100 Liters c) 10 dKL d) 1 meter
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