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How fast is 8 kilometers per hour?

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It's about one-fiftieth as fast as a Peregrine Falcon.
In other words, 8 kilometers per hour is 0.0206 times the speed of a Peregrine Falcon, and the speed of a Peregrine Falcon is 48.50 times that amount.
(a.k.a. Peregrine, a.k.a. Duck Hawk, Falco peregrinus)
The Peregrine Falcon can reach speeds of up to 389 kph 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 one-one-hundred-fiftieth as fast as The Speed of Sound.
In other words, 8 kilometers per hour is 0.00648 times the speed of The Speed of Sound, and the speed of The Speed of Sound is 154 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-one-hundred-fiftieth as fast as a Bullet (Handgun).
In other words, 8 kilometers per hour is 0.00579 times the speed of a Bullet (Handgun), and the speed of a Bullet (Handgun) is 173 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 one-three-hundredth as fast as a Jet Fighter.
In other words, 8 kilometers per hour is 0.0033 times the speed of a Jet Fighter, and the speed of a Jet Fighter is 300 times that amount.
(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 2,400 kilometers per hour. The F-16 has a flight ceiling of approximately 15 km (9.32 mi).
It's about one-four-hundredth as fast as a Bullet (Rifle).
In other words, 8 kilometers per hour is 0.00243 times the speed of a Bullet (Rifle), and the speed of a Bullet (Rifle) is 412 times that amount.
(5.56 x 45 mm, a.k.a. 5.56 NATO)
A 5.56 x 45 mm cartridge is fired at a velocity of 3,294 kph. As the NATO rifle cartridge, it is used by the military forces of more than thirty-one countries, including use in the M16 series, M4 Carbine, HK-416, and M249 Squad automatic weapons used by the United States armed forces.
It's about one-three-thousand-five-hundredth as fast as The Space Shuttle.
In other words, 8 kilometers per hour is 0.00028698 times the speed of The Space Shuttle, and the speed of The Space Shuttle is 3,484.60 times that amount.
(Orbiter vehicle velocity)
The space shuttle orbits at a speed of 27,877 kph. During liftoff, the space shuttle accelerates to orbital speed in 8.5 minutes, consuming over 1.59 million kg (3.51 million lbs) of propellant in the process.
It's about one-twenty-thousandth as fast as a Meteor.
In other words, the speed of a Meteor is 19,000 times 8 kilometers per hour.
(formally Meteoroid or meteorite, depending on the context; a.k.a. "shooting star", a.k.a. "falling star")
Small meteoroids enter the Earth's atmosphere at speeds between 40,000 kph and 260,000 kph, depending on their size. The fireball effect, known as ablation, ceases once the atmosphere has slowed the meteoroid to a velocity of about 10,000 kph.