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How fast is 150 kilometers per hour?

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It's about four-and-a-half times as fast as Flo-Jo.
In other words, 150 kilometers per hour is 4.4460 times the speed of Flo-Jo, and the speed of Flo-Jo is 0.22490 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 33.74 kph. Known as a 200 m runner, Joyner also set a record time in a 100 m race at in 1987.
It's about five-and-a-half times as fast as Noah Ngeny.
In other words, 150 kilometers per hour is 5.4980 times the speed of Noah Ngeny, and the speed of Noah Ngeny is 0.18190 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 27.28 kph. According to some reports, Ngeny did not begin running competitively until just three years before setting the record.
It's about six times as fast as a Bull.
In other words, 150 kilometers per hour is 6.20 times the speed of a Bull, and the speed of a Bull is 0.160 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 24 kph. 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, 150 kilometers per hour is 0.1210 times the speed of The Speed of Sound, and the speed of The Speed of Sound is 8.260 times that amount.
(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 343 m/s. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 5,390 kilometers per hour to 5,620 kilometers per hour in water, depending on its salinity.
It's about one-tenth as fast as a Bullet (Handgun).
In other words, 150 kilometers per hour is 0.1090 times the speed of a Bullet (Handgun), and the speed of a Bullet (Handgun) is 9.170 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 1,380 kph. This type of ammunition has been the standard issue round of the United States Federal Bureau of Investigation (FBI) since 1990.
It's about fifteen times as fast as a Crocodile.
In other words, the speed of a Crocodile is 0.067 times 150 kilometers per hour.
(American Crocodile, Crocodylus acutus) (swimming speed)
An American crocodile can reach speeds in the water of up to 10 kph. On land, larger crocodiles can "gallop" when fleeing danger at speeds of up to 20 kph.
It's about one-fifteenth as fast as a Jet Fighter.
In other words, the speed of a Jet Fighter is 16 times 150 kilometers per hour.
(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 nan kilometers per hour. The F-16 has a flight ceiling of approximately 15 km (9.32 mi).