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Author Question: I live 20 minutes from Center City. How is this statement similar to giving astronomical distances ... (Read 21 times)

saraeharris

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on: Jul 27, 2018
I live 20 minutes from Center City. How is this statement similar to giving astronomical distances in light-years?
 
  What will be an ideal response?

Question 2

From what you know about astronomical units and light-years, how would you define a light-minute?
 
  What will be an ideal response?


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sierrahalpin

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Reply #1 on: Jul 27, 2018
Answer to Question 1

Twenty minutes is a measurement of time. In this case, the person speaking is referring to the time it takes to travel from City Center to home. If someone says an object is a distance of a certain number of light years, this is incorrect. Light-years is a measurement of distance. It is a common misperception that a light-year is a unit of time, because it has the word year.

Answer to Question 2

A light-minute is the distance light travels in a minute, or (3.0  108 m)(60 s) = 18  106 km.


saraeharris

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Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

marict

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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