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Earn +20 ptsQ: What two quantities does mechanical efficiency compare?
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Continue Learning about Math & Arithmetic
Can you use percents to compare two quantities?
Yes
How is a ratio or rate used to compare two quantities or values and where can examples of ratios and rates be found?
One example is the quoted fuel efficiency of cars: either in kilometres per litre or as miles per gallon.
What is to compare two quantities that have the same type of units?
You can subtract them or divide them. If you subtract them, the result is their difference. If you divide them, the result is their ratio.
Is it true that two quantities having different dimension can be multiplied but they cannot be subtracted?
Yes, that's true. Basically you can multiply and divide them; but you can't add, subtract, or compare them.
What are ratios of equal quantities?
The ratio of two equal quantities is 1 .
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