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OpenStudy (anonymous):

How to calculate a light year? (c)=?

OpenStudy (vincent-lyon.fr):

Distance travelled by light in a vacuum during one year: it is just a matter of proportionality.

OpenStudy (vincent-lyon.fr):

c = 299 792 458 m/s

OpenStudy (vincent-lyon.fr):

A light-second is 299 792 458 metres A light-minute is.... A light-hour is.... A light-day is.... A light-year is....

OpenStudy (anonymous):

light travels 1 feet per nanosecond that is (0.000000001 seconds)

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