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Equivalents in other units


How fast is 391 meters per hour?

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It's about one-three-hundredth as fast as a Knuckleball (baseball).
In other words, 391 meters per hour is 0.0036 times the speed of a Knuckleball (baseball), and the speed of a Knuckleball (baseball) is 280 times that amount.
(a.k.a. knuckler, a.k.a. floater, a.k.a. dancer, a.k.a. butterfly ball) (major league average)
It's about one-three-hundredth as fast as a Cheetah.
In other words, 391 meters per hour is 0.003539 times the speed of a Cheetah, and the speed of a Cheetah is 282.6 times that amount.
(Acinonyx jubatus)
The cheetah can reach speeds of up to 110,500 meters per hour in short bursts. From a crouching position, the cheetah can attain these speeds in just 2.25 seconds.
It's about one-three-hundredth as fast as a Hurricane.
In other words, 391 meters per hour is 0.00328 times the speed of a Hurricane, and the speed of a Hurricane is 305 times that amount.
(formally: Topical cyclone; a.k.a. typhoon)
It's about one-three-hundredth as fast as a Curveball (baseball).
In other words, 391 meters per hour is 0.0032 times the speed of a Curveball (baseball), and the speed of a Curveball (baseball) is 310 times that amount.
(a.k.a. hook, a.k.a. hammer, a.k.a. yakker) (major league average)
It's about one-four-hundredth as fast as a Fastball (baseball).
In other words, 391 meters per hour is 0.0026 times the speed of a Fastball (baseball), and the speed of a Fastball (baseball) is 380 times that amount.
(a.k.a. rising fastball, a.k.a. cross-seam fastball, a.k.a. heater, a.k.a. hummer, a.k.a. smoker; for four-seam grip) (major league average)
It's about one-five-hundredth as fast as a Skydiver (belly-to-earth).
In other words, the speed of a Skydiver (belly-to-earth) is 500 times 391 meters per hour.
(Belly-to-Earth orientation, average conditions, terminal velocity)
It's about one-five-hundredth as fast as a Tornado.
In other words, 391 meters per hour is 0.001967256 times the speed of a Tornado, and the speed of a Tornado is 508.3223 times that amount.
(EF2) (wind speed range average)