Answer
b. 8 hours
Work Step by Step
We use the equation for period to find:
$T=\sqrt{\frac{4\pi^2r^3}{GM_E}}$
$T=\sqrt{\frac{4\pi^2(20,200\times10^3)^3}{(6.67\times10^{-11})(5.97\times10^{24})}}\approx \fbox{8 hours}$
Essential University Physics: Volume 1 (4th Edition)
by Wolfson, Richard
Published by
Pearson
ISBN 10:
0-134-98855-8
ISBN 13:
978-0-13498-855-9
Chapter 8 - Exercises and Problems - Page 149: 76
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