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Practice problem

Converting Units

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Watt’s the Ratio?\text{Watt's the Ratio?}

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Sun and planets.

The Sun produces about 400,000,000,000,000,000,000,000,000 watts of power. The Earth is about 150 billion meters from the Sun, and the Earth has radius of about 6000 kilometers. All humans on Earth consume a total of about 1,000,000,000,000 watts (averaged over the day). What is the approximate ratio of the total amount of solar power hitting Earth over the total amount consumed by humans?

Choose one answer

Type a concept, like “slope” or “photosynthesis”.

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