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How fast is 72 kilometers per second?

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It's about three-fourths as fast as a bolt of Lightning
In other words, 72 kilometers per second is 0.73 times the speed of a bolt of Lightning, and the speed of a bolt of Lightning is 1.4 times that amount.
(atmospheric electrical discharge)
A bolt of lightning can travel at up to 97 kilometers per second when arcing from the atmosphere to the Earth. An estimated 280 million lightning strikes strikes occur each year.
It's about one-and-seven-tenths times as fast as a Meteor
In other words, 72 kilometers per second is 1.7 times the speed of a Meteor, and the speed of a Meteor is 0.59 times that amount.
(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 11 kilometers per second and 72 kilometers per second, depending on their size. The fireball effect, known as ablation, ceases once the atmosphere has slowed the meteoroid to a velocity of about 2.80 kilometers per second.
It's about nine-and-a-half times as fast as The Space Shuttle
In other words, 72 kilometers per second is 9.298 times the speed of The Space Shuttle, and the speed of The Space Shuttle is 0.10755 times that amount.
(Orbiter vehicle velocity)
The space shuttle orbits at a speed of 7.74360 kilometers per second. 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 80 times as fast as a Bullet (Rifle)
In other words, 72 kilometers per second is 78.7 times the speed of a Bullet (Rifle), and the speed of a Bullet (Rifle) is 0.013 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 0.9150 kilometers per second. 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 100 times as fast as a Jet Fighter
In other words, 72 kilometers per second is 110 times the speed of a Jet Fighter, and the speed of a Jet Fighter is 0.009 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 0.670 kilometers per second. The F-16 has a flight ceiling of approximately 15 km (9.32 mi).
It's about 200 times as fast as a Bullet (Handgun)
In other words, 72 kilometers per second is 188 times the speed of a Bullet (Handgun), and the speed of a Bullet (Handgun) is 0.0053 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 0.3830 kilometers 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 200 times as fast as The Speed of Sound
In other words, 72 kilometers per second is 210 times the speed of The Speed of Sound, and the speed of The Speed of Sound is 0.0048 times that amount.
(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 0.3430 kilometers per second. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 1.50 kilometers per second to 1.560 kilometers per second in water, depending on its salinity.