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流星爆炸

我刚读了这篇文章流星在大西洋上空爆炸州”由美国宇航局发布的数据表明,流星释放的能量相当于12000吨TNT(13000吨),它是移动超过每秒15.5公里(9.6英里每秒)。”Awesome. I understand that part. What I don't necessarily understand is how an explosion happened if the meteor is disintegrating. Is it when the meteor enters the atmosphere, or is there some reaction that I'm missing. Thanks!

编辑,我的理解是,它引起了爆炸后进入大气层之前触及地面。我的问题是,如何可能?我理解大气和地面的概念会导致爆炸,但在半空中的时候怎么可能?

PS -不明白溢出我应该将这个问题。这个听起来最好的。谢谢!

回答

我看看你的问题对了:你想了解陨石爆炸的原因是什么?让我们在一个可以理解的方式解释。你知道在太空中我们几乎绝对真空因此没有流星和其他粒子之间的摩擦,这是它之所以能达到如此高的速度,不熔化或爆炸。进入地球大气层陨石周围的粒子密度上升由于其速度非常快。陨石一定电阻依赖于它的速度和规模。这就像biketrip出去。你走得越快越空气阻力可以感觉,更当穿一件厚夹克为例,这意味着更高的表面来攻击。所以,流星进入大气层,与之相撞。取决于它的密度、硬度和整体能量会发生三件事:1。密集,难以承受碰撞,但会有如此高的增加热能由于摩擦,它开始熔化/蒸发而前进2“缓慢”。它有如此高的能量和/或小密度和硬度,释放的能量足以让陨石evaporize或爆炸坠毁,直接与大气。 3. It withstands the thermal and mechanical energy arising and keeps on flying Of course the meteorite loses energy during that process and will slow down. Note that the energy is not lost but transformed. The air/rocks around the impact will have an increase in energy causing them to thermally expanse extremely fast thus creating a shockwave. This part is what you could call the main explosion. The explosion of the rock itself is also well explained with this: > "With the meteor moving at this speed, there is a lot of heat generated (compression, as well as friction/viscosity). This boils the meteor (many meteors contain ice or dry ice), leading to a buildup in pressure. If the boiling happens too quickly, the meteor will explode." The friction increases the farther the meteorite moves so the energy will get higher and higher until the above mentioned happens. This would be a "non-contact-explosion".. Also the Atmosphere consists of more than one layer of different densities (lower layer, higher density) so the whole process of crashing into a wall of higher density happens several times before finally reaching earth's surface. In case 3 the meteorite will keep flying until hitting a harder surface, that would be our earth in this case. The earth is big and hard enough to absorb the energy from the impact. So the meteorite crashes and will then release it's entire internal energy, since it can't move forward anymore, which in most cases is high enough to let it explode or evaporize.. In case of a very small meteorite it might just crash without exploding, because it can withstand the energy, but will still create an impact crater. So the process when hitting the atmosphere or earth's surface is the same: A change in density causes the meteorite to release energy. At the end a little metaphor for even better understanding: You take a rock and throw it against a wall.. It crashes and will maybe create a little crater but it won't explode.. Now you take the same rock and throw it as hard as you can so it has more energy.. when hitting the wall again it will release all it's energy and explode.. Due to the walls hardness it can't move through it, of course unless the rock is is harder than the wall and fast enough.. That would be the equivalent to the meteorite hitting earth. Try the same mind experiment with the same rock being thrown at water, which would be the equivalent to the meteorite hitting the atmosphere, which can be seen as a fluid. Summarized: - The meteorite crashes into a higher density wall and the set free energy causes it to disrupt, like a rock thrown at a wall - The build up pressure of fluids within the meteorite causes it to explode PS: So the release of energy when colliding is what causes the explosion whether it disintegrates or not. The equivalent to 15.000 tons of TNT represents the internal energy of the meteorite that's set free.

编辑总结

取消

\ begingroup美元实际上更多的“陨石如何造成这样的爆炸而不触及地面,因为它瓦解了吗?” \ endgroup美元
- - - - - -凯文·菲舍尔
2016年2月24日18:40
\ begingroup美元看来我今天很难理解,对不起。你能澄清问题多一点。我也想我解释说。通过爆炸你说空气的热膨胀引起的陨石吗? \ endgroup美元
- - - - - -卢佩雷斯
2016年2月24日在18:46
\ begingroup美元我的理解是,它造成了爆炸后进入大气层之前触及地面。这是我的问题,如何是可能的。我理解大气和地面的概念会导致爆炸,但在空中? \ endgroup美元
- - - - - -凯文·菲舍尔
2016年2月24日18:56
1

\ begingroup美元好了!我添加了一个引用我的答案。最后我认为应该解释你的问题。:) \ endgroup美元
- - - - - -卢佩雷斯
2016年2月24日19:07

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