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How fast is 87 knots?

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It's about 1,000,000,000 times as fast as Grass growing
In other words, 87 knots is 1,100,000,000 times the speed of Grass growing, and the speed of Grass growing is 0.00000000091 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 0.0000000820 knots 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 650 times as fast as a Sloth
In other words, 87 knots is 670 times the speed of a Sloth, and the speed of a Sloth is 0.002 times that amount.
(for Brown-throated three-toed sloth, Bradypus variegatus)
The three-toed sloth moves along the ground at an average speed of 0.130 knots. Long thought to be lengthy sleepers, a 2008 study concluded that sloths sleep an average of only 9.6 hours per day.
It's about 90 times as fast as an Iceberg
In other words, 87 knots is 90 times the speed of an Iceberg, and the speed of an Iceberg is 0.0 times that amount.
(a.k.a. Berg) (Newfoundland iceberg average)
Moved by ocean currents and wind, icebergs can drift at speeds of about 1 knot. The largest iceberg ever recorded was a found near Baffin Island, Nunavut and was estimated to be nine billion metric tons.
It's about thirty times as fast as Walking Pedestrians (in Manhattan)
In other words, 87 knots is 34 times the speed of Walking Pedestrians (in Manhattan), and the speed of Walking Pedestrians (in Manhattan) is 0.03 times that amount.
(Manhattan; average speed; 8,978 person-sample)
A 2006 Study by the New York City Department of City Planning found that pedestrians in that city walk at an average rate of 2.50 knots. Pedestrians wearing headphones, the study went on to find, walk at a slightly faster 2.70 knots
It's about twenty times as fast as Michael Phelps
In other words, 87 knots is 23.04 times the speed of Michael Phelps, and the speed of Michael Phelps is 0.04340 times that amount.
(at the Beijing Olympics, 2008; 200 m freestyle) (a.k.a. Michael Fred Phelps) (swimmer; 1985-)
Setting a world record, Michael Phelps swam the 200 m freestyle in 1:42.96 for an average speed of 3.77590 knots. Phelps would go on to win nine gold medals individually in the 2008 Olympics - more than all but eight of the competing nations.
It's about seventeen times as fast as a Crocodile
In other words, 87 knots is 17 times the speed of a Crocodile, and the speed of a Crocodile is 0.06 times that amount.
(American Crocodile, Crocodylus acutus) (swimming speed)
An American crocodile can reach speeds in the water of up to 5.40 knots. On land, larger crocodiles can "gallop" when fleeing danger at speeds of up to 11 knots.
It's about six-and-a-half times as fast as a Bull
In other words, 87 knots is 6.7 times the speed of a Bull, and the speed of a Bull is 0.15 times that amount.
(for animals involved in the Running of the Bulls, a.k.a. Encierro, San Fermin, Pamplona, Spain) (herd average speed)
The herd of the annual Encierro in Pamplona, Spain runs at an average speed of 13 knots. The Encierro is run annually from July 7th through July 14th and involves 42 bulls, 77 oxen, and an estimated 17,000 runners over the course of the event.