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I would like to propose to have Saitama's speed be upgraded from at least Sub-Relativistic to at least Relativistic+ and possibly higher as he wasn't serious with the punch.
In the links below, Ethan R. Siegel, an American theoretical astrophysicist, explains the science of a man destroying a meteor in one punch.
https://www.forbes.com/sites/starts...topping-a-meteor-with-one-punch/#48feaa964b72
https://www.facebook.com/Nerdist/videos/1657162807634854/
Asteroids, when they strike Earth, typically come in with a speed of 17 km/s, while comets strike us at around 51 km/s, having come from farther out. Asteroids are rockier, denser and often larger, while comets tend to be icy, porous and frequently smaller. To merit a "9" on the Torino scale and produce the energy of a hundred hydrogen bombs -- around 10^19 Joules, or the conversion of a human's worth of matter into pure energy via Einstein's E = mc^2 -- an asteroid would need a mass of around 70 billion kg, and would measure the size of about three football fields in every dimension.
The key to stopping an asteroid with one punch, though, isn't as much about the energy as it is about the momentum. If you can create a (mostly) inelastic collision with an equal-and-opposite amount of momentum to the asteroid, you can stop it dead in its tracks. Yes, you'll still have 70 billion kg (or 70 million tons) of debris falling on your city, but a slew of rocky debris falling from a height of a few hundred meters is a lot less terrifying than being vaporized in a single, fiery impact. For a full-grown adult human, that means traveling at a speed of around 99.99999997% the speed of light, or 299792457.91 meters/second: 2.9 meters/second closer to the speed of light than the fastest protons in the LHC at CERN. Except it's not a proton that needs to be accelerated to that speed; it's around 10^28 of them. It's an entire human being.
If I made any errors or if you have a counter argument, please feel free to reply.
In the links below, Ethan R. Siegel, an American theoretical astrophysicist, explains the science of a man destroying a meteor in one punch.
https://www.forbes.com/sites/starts...topping-a-meteor-with-one-punch/#48feaa964b72
https://www.facebook.com/Nerdist/videos/1657162807634854/
Asteroids, when they strike Earth, typically come in with a speed of 17 km/s, while comets strike us at around 51 km/s, having come from farther out. Asteroids are rockier, denser and often larger, while comets tend to be icy, porous and frequently smaller. To merit a "9" on the Torino scale and produce the energy of a hundred hydrogen bombs -- around 10^19 Joules, or the conversion of a human's worth of matter into pure energy via Einstein's E = mc^2 -- an asteroid would need a mass of around 70 billion kg, and would measure the size of about three football fields in every dimension.
The key to stopping an asteroid with one punch, though, isn't as much about the energy as it is about the momentum. If you can create a (mostly) inelastic collision with an equal-and-opposite amount of momentum to the asteroid, you can stop it dead in its tracks. Yes, you'll still have 70 billion kg (or 70 million tons) of debris falling on your city, but a slew of rocky debris falling from a height of a few hundred meters is a lot less terrifying than being vaporized in a single, fiery impact. For a full-grown adult human, that means traveling at a speed of around 99.99999997% the speed of light, or 299792457.91 meters/second: 2.9 meters/second closer to the speed of light than the fastest protons in the LHC at CERN. Except it's not a proton that needs to be accelerated to that speed; it's around 10^28 of them. It's an entire human being.
If I made any errors or if you have a counter argument, please feel free to reply.
