Answered: Grass grows densely everywhere on a…

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter1: Units And Measurement

Section: Chapter Questions

Problem 17P: A generation is about one-third of a lifetime. Approximately how many generations have passed since...

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Grass grows densely everywhere on a 0.300 acre plot of land. What is the approximate number of blades of grass on this plot of land? Suppose each blade occupies 1/10 in² of area. (1 acre = 43 560 ft².) With Significant Figures considered.

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The are of the plot is

$A = 0.3 a c r e S i n c e 1 a c r e = 43560 f t^{2}, A = 0.3 \times 43560 A = 13068 f t^{2}$

$A_{b l a d e} = 0.1 i n^{2} S i n c e 1 f t^{2} = 144 i n^{2} A_{b l a d e} = \frac{0.1}{144} A_{b l a d e} = 6.95 \times 10^{- 4} f t^{2}$

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