Satellite Motion: Speed & Period Video Lessons

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Problem: a) The distance to polaris, the north star is approximately 6.44 ×1018 m, if polaris were to burn out today how many years will it take to see it disappear? b) how long does it take sunlight to reach the earth?c) how long does it take a microwave signal to travel from the earth to the moon and back?

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Time is expressed as:

t=dc,

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Problem Details

a) The distance to polaris, the north star is approximately 6.44 ×1018 m, if polaris were to burn out today how many years will it take to see it disappear? 

b) how long does it take sunlight to reach the earth?

c) how long does it take a microwave signal to travel from the earth to the moon and back?

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