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How fast is 543 miles per second?

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It's about 15,000 times as fast as a Tornado.
In other words, 543 miles per second is 15,828.340 times the speed of a Tornado, and the speed of a Tornado is 0.000063177820 times that amount.
(EF2) (wind speed range average)
According to the Enhanced Fujita scale implemented by the US National Oceanographic and Atmospheric Administration, a "significant" tornado has an Enhanced Funjita scale classification of EF2 and is characterized by wind gust speeds between 0.03055556 miles per second and 0.03805556 miles per second. The largest recorded tornado — an F4 event occurring in Nebraska in May, 2004 — was almost 4.02 km (2.5 mi) across.
It's about 10,000 times as fast as a Skydiver (headfirst).
In other words, 543 miles per second is 12,000 times the speed of a Skydiver (headfirst), and the speed of a Skydiver (headfirst) is 0.0000830 times that amount.
(Head-to-Earth orientation or standing, average conditions, terminal velocity)
A head-to-Earth or standing-oriented skydiver's terminal velocity assuming average conditions is about 0.045 miles per second. In a typical jump from 3,900 m (13,000 ft), a diver in this orientation will be in freefall for 46 seconds.
It's about 10,000 times as fast as a Helicopter.
In other words, 543 miles per second is 11,100 times the speed of a Helicopter, and the speed of a Helicopter is 0.00009010 times that amount.
(for AH-64A Apache, a.k.a. Hughes Model 77) (maximum cruise speed)
The AH-64 helicopter, one of the primary helicopters used by the United States Army, flies at a top cruise speed of 0.049 miles per second. The AH-64 is the primary military helicopter of several nations including the United States, the United Kingdom, Israel, Japan, and the Netherlands.
It's about 10,000 times as fast as a Lamborghini Gallardo.
In other words, 543 miles per second is 9,800 times the speed of a Lamborghini Gallardo, and the speed of a Lamborghini Gallardo is 0.0001 times that amount.
(for Gallardo LP 550-2, a.k.a. Valentino Balboni, 2009 model)
The Lamborghini Gallardo LP550-2 model Gallardo has a top speed of 0.055 miles per second. The Gallardo can reach speeds of 0.017 miles per second in just 3.9 seconds.
It's about 10,000 times as fast as The TGV (train).
In other words, 543 miles per second is 9,800 times the speed of The TGV (train), and the speed of The TGV (train) is 0.0001 times that amount.
(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 0.055 miles per second. The train is capable of travelling the 425 km (264 mi) distance from Paris to Lyon in East-Central France in about two hours.
It's about 9,500 times as fast as an Arrow (archery).
In other words, 543 miles per second is 9,745 times the speed of an Arrow (archery), and the speed of an Arrow (archery) is 0.0001026 times that amount.
(250 g arrow fired from 60#/28" bow)
A 250 gram arrow will reach speeds of approximately 0.05572 miles per second when fired from a 60-lb, 28-inch draw bow . Archeological evidence from the Ahrensburg valley near Hamburg, Germany indicates that arrows have been used since at least 11 to 12,000 years ago.
It's about 9,500 times as fast as a Porsche 911.
In other words, 543 miles per second is 9,560 times the speed of a Porsche 911, and the speed of a Porsche 911 is 0.000105 times that amount.
(for Porsche 911 Type 997 GT2, 2007 model)
The Porsche 911 GT2 has a top speed of 0.0568 miles per second. It takes just 7.4 seconds for the GT2 to accelerate to 0.0278 miles per second.