College Physics (4th Edition)

Published by McGraw-Hill Education
ISBN 10: 0073512141
ISBN 13: 978-0-07351-214-3

Chapter 26 - Problems - Page 1009: 2


(a) $1~light~second = 3.0 \times 10^8~m$ (b) $v = 1 ~light~second~per~second$

Work Step by Step

(a) We can find the distance light travels in one second: $d = v~t$ $d = (3.0\times 10^8~m/s)(1.0~s)$ $d =3.0\times 10^8~m$ $1~light~second = 3.0 \times 10^8~m$ (b) We can find the speed of light: $v = \frac{distance}{time}$ $v = \frac{1~light~second}{1~second}$ $v = 1 ~light~second~per~second$
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