"Escape Velocity is the minimum speed required for a body to overcome the effects of Earth's gravity. At the Earth's surface, the velocity of escape is 25,000 miles an hour; 500 miles above the Earth, it is 22,300 miles an hour; 5,000 miles from the Earth it is reduced to 16,630 miles per hour.Illustration: "Atlas missile taking off from launching pad."
Issue: The Flash #113 (June-July 1960)
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