## Physics for Scientists and Engineers 3E by R. Knight, P1.33

#### Estimate the average speed with which the hair on your head grows. Give your answer in both m/s and µm/hour. Briefly describe how you arrived at this estimate.

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## Physics for Scientists and Engineers 3E by R. Knight, P1.29

#### d. $\displaystyle 12.5^{-1}$

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## Physics for Scientists and Engineers 3E by R. Knight, P1.28

#### d. $\displaystyle 333.3\div 25.4$

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