流星爆炸,地球科学堆栈交换江南电子竞技平台江南体育网页版 最近30从www.hoelymoley.com 2023 - 08 - 06 - t16:15:04z //www.hoelymoley.com/feeds/question/7573 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/7573 2 流星爆炸 凯文·菲舍尔 //www.hoelymoley.com/users/5527 2016 - 02 - 24 t17:12:55z 2016 - 02 - 24 t19:28:52z < p >我读这篇文章< a href = " http://www.iflscience.com/space/largest-meteor-years-fell-over-atlantic " rel =“nofollow”>流星在大西洋上空爆炸< / >,它指出,“由NASA公布的数据表明,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!

Edit - My understanding is that it caused an explosion after entering the atmosphere prior to hitting the ground. My question is how that is possible? I understand the concept of the atmosphere and ground would cause an explosion, but how is it possible while in mid-air?

PS - Couldn't figure out which Overflow I should place this question in. This one sounded the best. Thanks!

 //www.hoelymoley.com/questions/7573/-/7574 # 7574 3 答案由卢佩雷斯流星爆炸 卢佩雷斯 //www.hoelymoley.com/users/5274 2016 - 02 - 24 t18:36:53z 2016 - 02 - 24 t19:12:15z < p >我看看你的问题对了:你想了解陨石爆炸的原因是什么?< / p > < p >让我们解释说,在一个可以理解的方式。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:< / p > < ol > <李> < p >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“缓慢”,而前进< / p > < /李> <李> < p >它有如此高的能量和/或小密度和硬度,释放的能量足够高,让陨石evaporize或爆炸坠毁,直接与大气。李李< / p > < / > < > < p >经受热产生的机械能和继续飞行< / p > < /李> < / ol > < p >当然陨石失去能量在这过程会慢下来。注意,不是失去,而是转换的能量。影响周围的空气/岩石会增加能量使他们热片极快从而产生冲击波。这部分你可以称之为主要爆炸。< / p >

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.

 //www.hoelymoley.com/questions/7573/-/7575 # 7575 3 回答大卫Hammen流星爆炸 大卫Hammen //www.hoelymoley.com/users/239 2016 - 02 - 24 t19:14:57z 2016 - 02 - 24 t19:14:57z < blockquote > < p >我不理解的是爆炸发生如果流星瓦解。< / p > < /引用> < p >,解体不是渐进的事情。石流星只是松散。没关系一个对象的空间。这不是好当流星撞击大气层。一旦一颗流星开始分裂,瓦解瀑布非常迅速。< / p >

That "Rapid Unscheduled Disassembly" of the meteor is the explosion. Instead of one object with a few pieces flying off, there are hundreds, then thousands, then tens of thousands of objects, all in short order. The surface area grows hugely, making those myriad chunks dump their kinetic energy into the atmosphere in a very short period of time.

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