College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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![4. What is the distance in kilometers to a star
that is 4.2 light years away?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F87573c1f-e99e-41d1-a108-161ab6bfa656%2F69f62487-03d7-4df1-8a6c-a764aae2638d%2Fsnyiuja_processed.png&w=3840&q=75)
Transcribed Image Text:4. What is the distance in kilometers to a star
that is 4.2 light years away?
Expert Solution
![](/static/compass_v2/shared-icons/check-mark.png)
Step 1
We know velocity of light (c)= 3×10^8 m/s
=3 ×10^5 km/s
1 year =365 days
=24×365 hours
=60×60×24×365 seconds
=31.54×10^6 s
So time (t)= 31.54×10^6 s
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