A common unit of length in astronomy is the parsec,where 1 parsec = 3.26 light years.How many seconds does it take a radio signal to travel one parsec through space? A)1.03 $\times$ 10⁸ s B)9.71 $\times$ 10⁸ s C)9.71 $\times$ 10⁷ s D)1.72 $\times$ 10⁶ s E)none of the above

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Quizplus · Accepted Answer

1 parsec = 3.26 light years = 3.26 * 9.46 * 10^12 km = 3.08 * 10^13 kmSpeed of light = 3 * 10^8 m/s = 3 * 10^5 km/sTime taken to travel 1 parsec = 3.08 * 10^13 km / 3 * 10^5 km/s = 1.03 * 10^8 s

A Common Unit of Length in Astronomy Is the Parsec,where ×\times×

A Common Unit of Length in Astronomy Is the Parsec,where $\times$