@jeepeh said:
@ratava said:
@jeepeh:
the problem with this calc is that there is no way to determine the velocity of this meteor so we cant say anything about the kinetic energy. the only thing we saw was gremmy "thinking" him into existence so basically we have a giant burning rock, everything else is just assumptions.
The calc says that the minimum possible speed for the fire of the meteor is 2 km/s. But that's ridiculously slow for a meteor.
btw: the velocity cant be that impressive, the debris from the meteor was causing < building level destruction or was Kenpachi miraculously sucking up all the kintetic energy?
He blew the meteor apart, those small fragments weren't falling from space they were falling from a few hundred feet up being blown out in all directions.
1. maybe the minimum possible speed for a real meteor, but gremmy just imagined a glowing fireball there is no need for a specific velocity, so at that point the calc is useless
The mere fact that it was on fire from the atmosphere says it was going that minimum speed.
2. it doesnt matter if they are falling from space or from the inner atmosphere, even if the debris would only hit with one or two km/s it would do some damage, the debris in the picture did nothing besides blowing up some dust, but that doesnt really matter as the calc is useless from the beginning
2 km/s = 4,473 mph. I don't think they'd be going that fast after it being stopped by Kenpachi. The pieces left over were tiny. A meteor at 2 meters wide with 500 kg per cubic meter density at 11 km/s would
- The projectile begins to breakup at an altitude of 84300 meters = 277000 ft
- The projectile bursts into a cloud of fragments at an altitude of 63600 meters = 208000 ft.
- The residual velocity of the projectile fragments after the burst is 10.1 km/s = 6.27 miles/s.
- The energy of the airburst is 1.99 x 10^10 Joules = 0.47 x 10^-5 MegaTons. That's negative,
- No crater is formed, although large fragments may strike the surface.
Energy before atmospheric entry: 1.27 x 10^11 Joules = 0.3 x 10^-4 MegaTons TNT
- The air blast at this location would not be noticed. (The overpressure is less than 1 Pa)
- There is no crater
- There is no global damage
- There is no ejecta
- There is no thermal radiation
- There is no seismic effects.
And that's assuming a 500 kg per cubic meter, which is just a random number, they're probably not close to that.
Also assuming they were going 11 km/s which they more then likely were not, they were probably falling at a very normal speed.
There is nothing wrong with the amount of damage the fragments caused.
How exactly is the calc useless? Tell me.
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