Answer
$Time~elapsed=2.57s$
Work Step by Step
We know that
$t=\frac{s}{v}$
We plug in the known values to obtain:
$t=\frac{7.68\times 10^8m}{3.0\times 10^8m/s}$
$t=2.57s$
Physics Technology Update (4th Edition)
by Walker, James S.
Published by
Pearson
ISBN 10:
0-32190-308-0
ISBN 13:
978-0-32190-308-2
Chapter 2 - One-Dimensional Kinematics - Problems and Conceptual Exercises - Page 49: 13
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