Meteorite hits ground in Russia?

[RockerGuy]

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Couple of years ago I saw a really bright/low one that crashed into the ground somewhere north of Ottawa. Even made a bit of a noise but nothing like this one.

While riding thru kitchener once, I saw a meteor shoot thru the sky. It freaked me out because I expected a big bang. It didnt hit ground but it was pretty bright.

As I always say the probability of this earth ending is if it is hit by a meteor. There are tons of space debris left over from the big bang

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[vince492]

^^ The thing was several meters in diameter....Its a big frigging sky and something like that easy to miss...and again, THERE WAS NO EXPLOSION...does it look like it exploded in those videos? Do you ask yourself where's the explosion when the F18 goes supersonic at the airshow?

I'm always amaze to read that people doesn't know any **** about the sonic boom....its high school ****! So yeah, the "explosion" is only the sound barrier being "broken", that is faster than 1 224km's hours at sea level.

 

[Xhumeka]

I'm always amaze to read that people doesn't know any **** about the sonic boom....its high school ****! So yeah, the "explosion" is only the sound barrier being "broken", that is faster than 1 224km's hours at sea level.

If that was just a sonic boom, then you would have had a 9 ton piece of rock slam into the ground.... which didn't happen.

The meteor — estimated to be about 9 tonnes — entered the Earth's atmosphere at a hypersonic speed of at least 54,000 km/h and shattered about 30 to 50 kilometres above the ground, the Russian Academy of Sciences said in a statement.
It released the energy of several kilotons above the Chelyabinsk region, the academy said.

 

[Red_Liner740]

What are you saying?? That i dont know my high school ****?

I'm always amaze to read that people doesn't know any **** about the sonic boom....its high school ****! So yeah, the "explosion" is only the sound barrier being "broken", that is faster than 1 224km's hours at sea level.

 

[Venom01]

Kinda makes you feel small and venerable

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[coyo]

Do you ask yourself where's the explosion when the F18 goes supersonic at the airshow?

I'd be willing to bet you've never seen / heard an F18 go supersonic at an airshow.

 

[Red_Liner740]

I'd be willing to bet you've never seen / heard an F18 go supersonic at an airshow.

And you'd loose that bet. For one, i have seen Mig's go supersonic back in Yugoslavia....and there are tons of youtube videos of F18's going supersonic at various airshows....but what exactly does that have to do with my analogy?

let me reword my analogy. Does anyone ask where is the explosion when a bull whip snaps? where is the explosion when lighting hits? In the end its exactly the same principle of an object breaking the sound barrier.

 

[professor]

And you'd loose that bet. For one, i have seen Mig's go supersonic back in Yugoslavia....and there are tons of youtube videos of F18's going supersonic at various airshows....but what exactly does that have to do with my analogy?

let me reword my analogy. Does anyone ask where is the explosion when a bull whip snaps? where is the explosion when lighting hits? In the end its exactly the same principle of an object breaking the sound barrier.

http://www.youtube.com/watch?v=g0Ed_fx9IFc

Agreed

 

[LiNK666]

It was the sonic boom that happens when something breaks the sound barrier (340 m/s at sea lvl) perhaps?

Your sonic boom is no match for the might of the soviet russian bear

 

[Boom King]

Apparently that one that went over Russia was a fragment of this one that's coming later.

Turns out the two events were unrelated according to NASA.

Updated preliminary estimates of the one that flew over Russia put it at about 17 metres and 10,000 tons. Apparently they couldn't detect it because it came from out of nowhere on the daylight side of the Earth, effectively cloaking it from the telescopes.

 

[coyo]

And you'd loose that bet. For one, i have seen Mig's go supersonic back in Yugoslavia....and there are tons of youtube videos of F18's going supersonic at various airshows....but what exactly does that have to do with my analogy?

Not much to do with the analogy, but you're asking people about watching F18's go supersonic, and here in NA on this forum, there'd be few who have ever seen or heard it, especially once it's explained that the pressure wave visible around / behind high speed aircraft does not necessarily indicate that mach has been achieved, as many think. Definitely, professor's video examples one reason why pilots have to stay away from it at airshows.

As for Yugo, well that doesn't surprise me.

 

[toybm]

So was the shock wave created by the sonic boom or from the meteor explosion?

 

[Boom King]

So was the shock wave created by the sonic boom or from the meteor explosion?

Other way around. An object travelling at supersonic speeds creates compressed pressure waves which then form into a shock wave that you hear as a sonic boom. It sounds like an explosion and the energy released was enough to shatter windows on the ground in this case.

 

[tricky]

And you'd loose that bet. For one, i have seen Mig's go supersonic back in Yugoslavia....and there are tons of youtube videos of F18's going supersonic at various airshows....but what exactly does that have to do with my analogy?

let me reword my analogy. Does anyone ask where is the explosion when a bull whip snaps? where is the explosion when lighting hits? In the end its exactly the same principle of an object breaking the sound barrier.

I think it's due to the fact that jets such as those are designed for those supersonic speeds, creating narrower oblique shockwaves with their sharp angled surfaces. A big *** rock is going to make one messy bow shock, and maybe that results in more energy hitting the ground.

I could be wrong though... only halfway through my gas dynamics course

 

[RetroGrouch]

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