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  3. go to a library or some other place where there...

Question: go to a library or some other place where there...

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Go to a library or some other place where there are a lot of books. Take any 10 books at random and note the number of pages. What are the number-average and weight-average number of pages of these books? Why is the weight-average number of pages greater than the number average?

What is the polydispersity index? Is there a situation where it (polydispersity index) would be unity?

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