Originally Posted by Blameless View Post
Originally Posted by dogbiscuit View Post
I Haven't seen many explanations of the explosion. After all, it's just a rock, not flying C4, so maybe parts of it vapourise - expanding gasses ?
These rocks are not objects designed with aerodynamics in mind, they are irregularly shaped chunks of rock and/or metal.
What do you think happens when you have such an object moving at extreme speed, that due to stresses such as entering an atmosphere, fails structurally, and within a split second increases in surface area several orders of magnitude?
It's going to disintegrate, and, due to friction, rapidly exchange most of it's kinetic energy for thermal energy, exploding in a fireball.
A huge number of meteors do this, and if they are big enough, and low enough when they do, we get what we saw in Russia today.
This man speaks in truth!
Take a chunk of ice, and throw it as HARD as you can against a wall. It will explode. Essentially the same premise here, only the wall is our atmosphere and the snowball is a giant metal filled rock flying at 13km/sec. Most of it gets burnt up from the atmosphere, what's left is still a fiery blaze in the sky until it can't take the stress anymore and it literally explodes into gazillions of particles. The result of speed+mass exploding creates a sonic shockwave, essentially, a sonic boom, but way more powerful. I heard on the radio that it was predicted that the shockwave was 30x as powerful as the Hiroshima bomb. That's a hell of a lot of force coming from something so small.
That all sounds right to me, yeah.