Answer
$L = 13.1~m$
Work Step by Step
Let $L_0 = 30.0~m$
We can find the length measured according to an astronaut on the other spaceship:
$L = L_0~\sqrt{1-\frac{v^2}{c^2}}$
$L = (30.0~m)~\sqrt{1-\frac{(0.90~c)^2}{c^2}}$
$L = 13.1~m$
College Physics (4th Edition)
by Giambattista, Alan; Richardson, Betty; Richardson, Robert
Published by
McGraw-Hill Education
ISBN 10:
0073512141
ISBN 13:
978-0-07351-214-3
Chapter 26 - Problems - Page 1010: 17
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