Question part a how much time does it take light to travel, Ask an Expert

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Question: Part A: How much time does it take light to travel from the moon to the earth, a distance of 384000 km ? Express your answer in seconds to three significant figures.

Part B: Light from the star Sirius takes 8.61 years to reach the earth. What is the distance to Sirius in kilometers? Express your answer in kilometers to three significant figures.

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