What will happen to our knowledge and Technology after a commet strike?

If something like the Shoemaker-Levy - the impactor on Jupiter about 15 years ago, happened on Earth, - it would be REALLY BAD - and because there were multiple comets, it's unlikely life would be sustained beyond microbial life. We'd probably have been wiped out.

End of all but microbial deep subterranean life - http://www.youtube.com/watch?v=oB3G0rvCIJc

But as George Carlin pointed out - "Don't worry - the planet will be fine - the people are f*cked - but the planet will be just fine."

Even with a small impactor, It would be VERY hard, for the survivors. Any large impactor would cause a planet-wide very strong EMP, so most / all electronics would be fried (so we are instantly - going to be back in the 1850's) in about 2 hours after impact.

This was really well discussed in the show "Super Comet - After the Impact" : http://www.youtube.com/watch?v=X7YYW7oKRUQ

Even if it was a small/regional impact, and portions of the world were relatively unaffected, the weather could be seriously impacted for many years, this has even happened with very large supervolcanos (in human history this has happened at least once) - the Toba Event, and will happen again (the Yellowstone Event).

Unless we found some seriously clever way to diffuse millions of megatons of pressure energy at Yellowstone, the day will come when most life on the North American continent - east of Wyoming will be covered in several inches of ash, and the middle part of the continent (at the least) will be uninhabitable for years if not decades.

Yellowstone event : http://www.youtube.com/watch?v=TPZAJQG0Dts

Toba Event - http://www.bradshawfoundation.com/journey/

Similarly, even under the best of circumstances, billions of people would die, on account of disease and starvation, as the planetary food production and supply chain was destroyed or disrupted.

After that radical depopulation, in an ideal circumstance (least number dead), perhaps 1-2 billion people would remain, and they would have the very hard task of dealing with the abandoned technology.

You have two problems - really

1. Loss of critical knowledge - this is the first point you made - what level of "sustained" knowledge would we retain, unless the population was radically reduced - to say a few thousand people, we would probably retain some awareness of most things, it would be possible to train up and consolidate humanity back into new cities and setup schools and rebuild civilization to some extent - along sustainable lines.

I suspect that unless things were truly catastrophic we could recover to a medieval state of affairs pretty quickly, beyond that it might take another 200-300 years - at the minimum to recover to a roughly 20th century level of functioning, and it might take many more centuries to recover to something where some part of the world wasn't in "recovery" mode still.

2. DANGEROUS areas would be the old cities and industrial areas - eventually these would need to be cleaned up or there would be large swaths of the planet that might become permanently uninhabitable - so refineries and chemical plants, fuel depots and nuclear reactors, would all be highly dangerous areas.

Consider the show, "Life After People" - http://www.youtube.com/watch?v=seG92TcVNdc

Many of our cities require constant maintenance, and without human intervention within just a few hours, even if they managed to survive the impact and it's immediate after-effects, they might become uninhabitable on account of flooding or contamination or some such.

"I'm not really sure what caused this... but over the past couple days I have become increasingly more interested in the events of 9/11. I know over the past few years there has been a lot of controversy surrounding whether or not the US Government was involved with the planning of/had prior knowledge of the events that unfolded that day. Personally, I don't know what to think. I don't know enough about what happened to come to my own personal conclusions, however, I do have some questions is anybody is willing to offer out any advice.. I guess my biggest question would have to be this: if the US Government was involved (hypothetically), why would they allow the events to take place *knowing* that hundreds, even thousands, could die? I mean, the one thing that strikes me as odd is this: the plane that crashed into the side of the Pentagon- officials knew that the plane was off course and basically just watched as it came closer and closer. Why did nobody try to stop it? They knew that the plane had passengers... what was going through their minds at the time? "I don't give two s****s if people are on board or not.. just let it crash." Why would they allow- what made them think it was OK to let the plane continue flying, and eventually crash, knowing there were passengers? It just blows my mind. Secondly... there's the suggestion that the government was involved in the planning of- and/or had prior knowledge to- the events which took place on 9/11. What would their motive have been? What could have been so important to the US Government that they just said, "Screw it. I don't care who dies, I don't care how many die. We're not going to try and stop this from happening." I've heard/read very little about any money being involved, or that this was even about money in the first place. Perhaps I'm not reading or watching the right things... but it just bugs me as to what their motive could have been. DISCLAIMER: It is not my intent to offend anybody. If I do, I sincerely apologize. I am not mocking the events that took place; I do not find it funny in the least. It is not my intent to start any kind of flame war with the people who may respond. I am basically just asking a couple questions, and if you're able to answer- that's awesome. In no way am I looking to pick a fight between myself and responders nor am I hopeful that this will cause fights between respondents. If you're going to be stupid and immature, don't even bother. You're not the kind of person I want help from anyway." idk cuz i aint reading that whole thing

Well, it can't be that hard. Someone who has been in boy scout camp or the military, or even a tourist who has been in survival situations should know. You could create a spark with a couple of stones.. something like that. Or do it the Native American kindling style.

It would require collaboration between scientists, engineers, and other intellectuals in order to "rediscover" and "restandardize" technology. They would then teach others how to do it. Hopefully not too many people would get killed off in the disaster.

A Physicist and Electrical Engineer should know how to create electricity from various sources. I think a lot of knowledge is held in Universities and libraries.

If only people would work together to be productive, instead of fighting each other over the last remaining resources when destruction hits.

The first basic need would be building a fire. Fire has given mankind upper hand against all living things. Hopefully, man will remember or will learn to make fire or he becomes extinct. With a population of over 6 billion, let's hope some will survive the comet strike and some will know how to make fire.

You ask about rebuilding a computer, which would prove a big task if things got real bad, but I ask what about starting a fire, many have trouble with that basic task.

It could be worse than you think as many are so far removed from what was learnt ages ago!

It will end... cause when comet hit the earth, all living things will be destroyed including our technology..

a what?

Comet???

Your questions seems so unlikely its too hypothetical.

those who are strong will live and those who are weak...

those technologies that are strong will live etc.