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How fast is 0.00081 miles per second?

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 It's about one-seventy-five-thousandth as fast as a bolt of Lightning In other words, 0.00081 miles per second is 0.000013 times the speed of a bolt of Lightning, and the speed of a bolt of Lightning is 77,000 times that amount. (atmospheric electrical discharge)A bolt of lightning can travel at up to 60 miles per second when arcing from the atmosphere to the Earth. An estimated 280 million lightning strikes strikes occur each year. It's about 35,000,000 times as fast as Grass growing In other words, 0.00081 miles per second is 33,000,000 times the speed of Grass growing, and the speed of Grass growing is 0.000000030 times that amount. (for Kentucky Bluegrass, Poa pratensis) (a.k.a. Smooth Meadow grass, a.k.a. Common Meadow grass) (Summer months, ideal growing conditions)Kentucky Bluegrass, one of the most common grasses in North America, grows about 0.0000000000260 miles per second in the summer months under ideal conditions. When left un-mowed, Kentucky Bluegrass grows to heights of 60 to 90 cm (2 to 3 ft) and blossoms with a blue flower. It's about 0.000000005 times as fast as The Speed of Light In other words, 0.00081 miles per second is 0.0000000043482369393029 times the speed of The Speed of Light, and the speed of The Speed of Light is 229,978,267.96447 times that amount. (C) (in a vacuum)The speed of light (and all other electromagnetic radiation) in a perfect vacuum is known as "c" and measures 186,282.397051220 miles per second, per the formal definition of the meter. While visible light travels close to this speed in air, it slows to 124,188.264702890 miles per second when passing through the glass of a typical window.