Unformatted text preview: desired units. To remove km, we multiply a conversion factor which has km in the denominator. We have 3.84 × 10 5 km = 3.84 × 10 5 km × (1 AU/1.50 × 10 8 km) = 2.56 × 103 AU b) The speed of light is about 3.0 × 10 8 m/s. Express the speed of light in astronomical units per minute. 1 km = 1000 m, thus 1 AU = 1.5 × 10 11 m. We multiply two conversion factors, one of which converts m to AU, and the other of which converts s to min. 3.0 × 10 8 m/s = 3.0 × 10 8 m/s × (1 AU/1.50 × 10 11 m) × (60 s/1 min) = 1.20 × 101 AU/min...
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 Fall '08
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 Physics, Work, Astronomical unit, average distance, astronomical units, Tomoyuki Nakayama

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