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How fast is 157 feet per minute?

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It's about one-one-hundred-thousandth as fast as a bolt of Lightning.
In other words, 157 feet per minute is 0.00000810 times the speed of a bolt of Lightning, and the speed of a bolt of Lightning is 120,000 times that amount.
(atmospheric electrical discharge)
A bolt of lightning can travel at up to 19,000,000 feet per minute when arcing from the atmosphere to the Earth. An estimated 280 million lightning strikes strikes occur each year.
It's about 20,000,000 times as fast as Grass growing.
In other words, the speed of Grass growing is 0.0000000500 times 157 feet per minute.
(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 0.00000830 feet per minute 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 0.000000003 times as fast as The Speed of Light.
In other words, 157 feet per minute is 0.00000000266037379766240 times the speed of The Speed of Light, and the speed of The Speed of Light is 375,887,027.93520 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 59,014,263,385.8270 feet per minute, per the formal definition of the meter. While visible light travels close to this speed in air, it slows to 39,342,842,257.8740 feet per minute when passing through the glass of a typical window.