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How fast is 0.0278 miles per second?

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It's about five times as fast as Flo-Jo
In other words, 0.0278 miles per second is 4.7740 times the speed of Flo-Jo, and the speed of Flo-Jo is 0.20950 times that amount.
(at the Seoul Olympics, 1998) (a.k.a. Florence Griffith-Joyner, a.k.a. Florence Delorez Griffith) (swimmer; 1959-1998)
Setting a world record in 1988, Flo-Jo ran a 200 m in 0:21.34 for an average speed of 0.005824 miles per second. Known as a 200 m runner, Joyner also set a record time in a 100 m race at in 1987.
It's about six times as fast as Noah Ngeny
In other words, 0.0278 miles per second is 5.9040 times the speed of Noah Ngeny, and the speed of Noah Ngeny is 0.16940 times that amount.
(in Rieti, Italy; 1999) (sprinter; 1978-)
Setting a world record at the Rieti Grand Prix in 1999, Noah Ngeny ran 1,000 m in 2:11.96 for an average speed of 0.004709 miles per second. According to some reports, Ngeny did not begin running competitively until just three years before setting the record.
It's about six-and-a-half times as fast as a Bull
In other words, the speed of a Bull is 0.150 times 0.0278 miles per second.
(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 0.0041 miles per second. 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.
It's about one-tenth as fast as The Speed of Sound
In other words, 0.0278 miles per second is 0.130 times the speed of The Speed of Sound, and the speed of The Speed of Sound is 7.690 times that amount.
(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 0.2130 miles per second. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 0.930 miles per second to 0.9690 miles per second in water, depending on its salinity.
It's about one-tenth as fast as a Bullet (Handgun)
In other words, 0.0278 miles per second is 0.1170 times the speed of a Bullet (Handgun), and the speed of a Bullet (Handgun) is 8.550 times that amount.
(for .40 Smith & Wesson 135 grain Sierra JHP, VV 3N37 powder, Fed. 100 primer, Remington case) (muzzle velocity)
A 0.40 caliber Smith & Wesson bullet has a muzzle a velocity of 0.2380 miles per second. This type of ammunition has been the standard issue round of the United States Federal Bureau of Investigation (FBI) since 1990.
It's about one-fifteenth as fast as a Jet Fighter
In other words, the speed of a Jet Fighter is 15 times 0.0278 miles per second.
(for Lockheed Martin F-16, a.k.a. Fighting Falcon, a.k.a. Viper) (maximum speed at altitude)
An F-16's maximum speed at altitude is approximately 0.420 miles per second. The F-16 has a flight ceiling of approximately 15 km (9.32 mi).
It's about seventeen times as fast as a Crocodile
In other words, the speed of a Crocodile is 0.059 times 0.0278 miles per second.
(American Crocodile, Crocodylus acutus) (swimming speed)
An American crocodile can reach speeds in the water of up to 0.0017 miles per second. On land, larger crocodiles can "gallop" when fleeing danger at speeds of up to 0.0035 miles per second.