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How fast is 241.8 mach?

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It's about four-fifths as fast as a bolt of Lightning.
In other words, 241.8 mach is 0.82 times the speed of a bolt of Lightning, and the speed of a bolt of Lightning is 1.2 times that amount.
(atmospheric electrical discharge)
A bolt of lightning can travel at up to 290 mach when arcing from the atmosphere to the Earth. An estimated 280 million lightning strikes strikes occur each year.
It's about one-and-nine-tenths times as fast as a Meteor.
In other words, the speed of a Meteor is 0.53 times 241.8 mach.
(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 34 mach and 220 mach, depending on their size. The fireball effect, known as ablation, ceases once the atmosphere has slowed the meteoroid to a velocity of about 8.4 mach.
It's about ten-and-a-half times as fast as The Space Shuttle.
In other words, 241.8 mach is 10.353 times the speed of The Space Shuttle, and the speed of The Space Shuttle is 0.09659 times that amount.
(Orbiter vehicle velocity)
The space shuttle orbits at a speed of 23.356 mach. 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 90 times as fast as a Bullet (Rifle).
In other words, 241.8 mach is 87.6 times the speed of a Bullet (Rifle), and the speed of a Bullet (Rifle) is 0.0114 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 2.76 mach. 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, 241.8 mach is 120 times the speed of a Jet Fighter, and the speed of a Jet Fighter is 0.0083 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 Mach 2. 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, 241.8 mach is 209 times the speed of a Bullet (Handgun), and the speed of a Bullet (Handgun) is 0.00478 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 1.16 mach. This type of ammunition has been the standard issue round of the United States Federal Bureau of Investigation (FBI) since 1990.
It's about 250 times as fast as The Speed of Sound.
In other words, 241.8 mach is 234 times the speed of The Speed of Sound, and the speed of The Speed of Sound is 0.00427 times that amount.
(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 1.03 mach. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 4.52 mach to 4.71 mach in water, depending on its salinity.