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How fast is 100,000 furlongs per fortnight?

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It's about one-fifth as fast as a Porsche 911
In other words, 100,000 furlongs per fortnight is 0.1820 times the speed of a Porsche 911, and the speed of a Porsche 911 is 5.490 times that amount.
(for Porsche 911 Type 997 GT2, 2007 model)
The Porsche 911 GT2 has a top speed of 550,000 furlongs per fortnight. It takes just 7.4 seconds for the GT2 to accelerate to 269,000 furlongs per fortnight.
It's about one-fifth as fast as The CRH (train)
In other words, 100,000 furlongs per fortnight is 0.170 times the speed of The CRH (train), and the speed of The CRH (train) is 5.90 times that amount.
(a.k.a. Hexie Hao, 和谐号, a.k.a. 和諧號, a.k.a. Héxié Hào, a.k.a. "Harmony")
The CRH-3 train which runs on China's Beijing-Tianjin Intercity Railway are capable of speeds up to 580,000 furlongs per fortnight. Theses train can make the 120 km (74 mi) journey from Beijing to Tianjin in about 30 minutes.
It's about six times as fast as a Crocodile
In other words, 100,000 furlongs per fortnight is 6.20 times the speed of a Crocodile, and the speed of a Crocodile is 0.160 times that amount.
(American Crocodile, Crocodylus acutus) (swimming speed)
An American crocodile can reach speeds in the water of up to 17,000 furlongs per fortnight. On land, larger crocodiles can "gallop" when fleeing danger at speeds of up to 33,000 furlongs per fortnight.
It's about one-fifth as fast as a Peregrine Falcon
In other words, 100,000 furlongs per fortnight is 0.1540 times the speed of a Peregrine Falcon, and the speed of a Peregrine Falcon is 6.490 times that amount.
(a.k.a. Peregrine, a.k.a. Duck Hawk, Falco peregrinus)
The Peregrine Falcon can reach speeds of up to 650,000 furlongs per fortnight when diving. Falcons are sometimes sent to scare smaller birds away from airports to improve air traffic safety and were used in World War II to intercept carrier pigeons used by enemy forces.
It's about eight-and-a-half times as fast as Michael Phelps
In other words, 100,000 furlongs per fortnight is 8.56160 times the speed of Michael Phelps, and the speed of Michael Phelps is 0.11680 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 11,680 furlongs per fortnight. 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 thirteen times as fast as Walking Pedestrians (in Manhattan)
In other words, the speed of Walking Pedestrians (in Manhattan) is 0.077 times 100,000 furlongs per fortnight.
(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 7,800 furlongs per fortnight. Pedestrians wearing headphones, the study went on to find, walk at a slightly faster 8,500 furlongs per fortnight
It's about one-twentieth as fast as The Speed of Sound
In other words, 100,000 furlongs per fortnight is 0.0485 times the speed of The Speed of Sound, and the speed of The Speed of Sound is 20.60 times that amount.
(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 2,060,000 furlongs per fortnight. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 9,000,000 furlongs per fortnight to 9,380,000 furlongs per fortnight in water, depending on its salinity.