The brightest star closest to Earth,aside from our own sun,is Sirius.Assuming light travels 2.998 *10⁸ meters in one second,how long does it take light to travel the 8.4 * 10¹³ km distance from Sirius to Earth?

Question

Quizplus · Accepted Answer

We can use the formula: distance = speed x time ( d = st) where distance is 8.4 x 10^13 meters and speed is 2.998 x 10^8 m/s.
Rearranging the formula to solve for time, we get: time = distance / speed.
Plugging in the values, we get:
time = (8.4 x 10^13 m) / (2.998 x 10^8 m/s) = 2.801 x 10^5 seconds
Converting seconds to years, we get:
time = 2.801 x 10^5 s / (60 s/min x 60 min/hr x 24 hr/day x 365 days/year)
time = 8.87 years (rounded to two decimal places)
Therefore, the best choice is C) 8.9 years.

The Brightest Star Closest to Earth,aside from Our Own Sun,is