(a) As of 2021, Earth's human population is roughly 7.9 109, and its total land area...

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(a) As of 2021, Earth's human population is roughly 7.9 109, and its total land area excluding the polar caps is roughly 5 107 square miles. If the human population were distributed uniformly over all available land, approximately how many persons would be found per square mile? (b) At the speed of light, which is 3 108 meters per second, how many seconds does it take for the sun's light to travel the 1.5 1011 meters to Earth? (a) As of 2021, Earth's human population is roughly 7.9 109, and its total land area excluding the polar caps is roughly 5 107 square miles. If the human population were distributed uniformly over all available land, approximately how many persons would be found per square mile? (b) At the speed of light, which is 3 108 meters per second, how many seconds does it take for the sun's light to travel the 1.5 1011 meters to Earth?

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a To determine the approximate number of persons per square mile if the human population were unifor... View the full answer