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Question: 

Our nearest star (other than the Sun) is 4.2 light-years away. That is, it takes 4.2 years for the light it emits to reach Earth. How far away is it in meters?

Source: Giancoli, Douglas C., Physics: Principles with Applications, 7th Edition, 2014.

Quick Answer: 

$4.0 \times 10^{16} \textrm{ m}$

Giancoli 7th Edition, Chapter 22, Problem 17

(0:54)

Chapter 22, Problem 17 is solved.

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