A light-year is the distance light travels in one year, at a speed = 2.998 x 10^8 m/s.
(a) How many meters are there in 1.00 light years?
(b) An AU is the average distance from the Sun to the Earth, 1.50 x 10^8 How many AU are there in 1.00 light-year?
(c) What is the speed of light in AU/h? ...?
A) 1 year = 365 days x 24 hours per day x 60 minutes per hour x 60 seconds per minute Seconds in one year = 31536000 seconds Distance covered = 2.99 x 10⁸ x 31536000 = 9.43 x 10¹⁵ m
B) 9.43 x 10¹⁵ / 1.5 x 10⁸ = 6.29 x 10⁷ AU
C) 2.99 x 10⁸ m/s x 60 s/min x 60 min/hr x 1AU/1.5 x 10⁸ m = 7176 AU/hr
