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How fast is 465.3 miles per hour?

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It's about three-fifths as fast as The Speed of Sound.
In other words, 465.3 miles per hour is 0.606 times the speed of The Speed of Sound, and the speed of The Speed of Sound is 1.65 times that amount.
(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 767 miles per hour. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 3,350 miles per hour to 3,490 miles per hour in water, depending on its salinity.
It's about half as fast as a Bullet (Handgun).
In other words, 465.3 miles per hour is 0.542 times the speed of a Bullet (Handgun), and the speed of a Bullet (Handgun) is 1.85 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 857 miles per hour. 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-and-nine-tenths times as fast as a Peregrine Falcon.
In other words, 465.3 miles per hour is 1.93 times the speed of a Peregrine Falcon, and the speed of a Peregrine Falcon is 0.518 times that amount.
(a.k.a. Peregrine, a.k.a. Duck Hawk, Falco peregrinus)
The Peregrine Falcon can reach speeds of up to 242 miles per hour 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 two times as fast as The CRH (train).
In other words, 465.3 miles per hour is 2.1 times the speed of The CRH (train), and the speed of The CRH (train) is 0.48 times that amount.
(a.k.a. Hexie Hao, 和谐号, a.k.a. 和諧號, a.k.a. Héxié Hào, a.k.a. "Harmony")
The CRH-3 train which runs on China's Beijing-Tianjin Intercity Railway are capable of speeds up to 220 miles per hour. Theses train can make the 120 km (74 mi) journey from Beijing to Tianjin in about 30 minutes.
It's about two-and-a-half times as fast as a Porsche 911.
In other words, 465.3 miles per hour is 2.28 times the speed of a Porsche 911, and the speed of a Porsche 911 is 0.439 times that amount.
(for Porsche 911 Type 997 GT2, 2007 model)
The Porsche 911 GT2 has a top speed of 204 miles per hour. It takes just 7.4 seconds for the GT2 to accelerate to 100 mph.
It's about two-and-a-half times as fast as a Lamborghini Gallardo.
In other words, the speed of a Lamborghini Gallardo is 0.43 times 465.3 miles per hour.
(for Gallardo LP 550-2, a.k.a. Valentino Balboni, 2009 model)
The Lamborghini Gallardo LP550-2 model Gallardo has a top speed of 200 miles per hour. The Gallardo can reach speeds of 62 miles per hour in just 3.9 seconds.
It's about two-and-a-half times as fast as The TGV (train).
In other words, the speed of The TGV (train) is 0.43 times 465.3 miles per hour.
(Train à Grande Vitesse) (for SNCF TGV Réseau, a.k.a. "Network" model, a.k.a. TGV-R) (maximum speed)
The TGV Réseau sets have a top speed of 200 miles per hour. The train is capable of travelling the 425 km (264 mi) distance from Paris to Lyon in East-Central France in about two hours.