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Old 2010-02-18, 03:30   Link #121
Jinto
Asuki-tan Kairin ↓
 
 
Join Date: Feb 2004
Location: Fürth (GER)
Age: 34
Quote:
Originally Posted by LeoXiao View Post
Relax, at least we'll be safe when we have to blow up some asteroid flying at us.
Its a misconception to believe that blowing up something works the same in earth's atmosphere and vacuum. In space there will be no major blast, just a lot of heat, and thats not really affecting the bigger ones all that much.
It is easier to detect them early and change their orbit slightly (by means of impacting large masses at a very high speed or by means of installing many boosters that maneuver the thing) so that they miss earth (and preferably hit the sun or another planet instead).
Besides even the tsar bomba (50/75 Mt) did imo not have a very strong blast. What nukes are good for is heat... heat that incinerates living creatures as well as light build housings/infrastructure over a huge area. And thats the difference between destruction caused by mass driven things like asteroids (huge impact craters, devastating blasts) and heat based devices like nuclear weapons (large incinerating fireballs with an - in comparison - weak blast effect).

Last edited by Jinto; 2010-02-18 at 03:48.
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Old 2010-02-18, 17:11   Link #122
amaius
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Join Date: Apr 2008
Location: Miami-gardens,florida
we all know one thing is that, decades from now robots, yes..."ROBOTS".... will take over the battlefield. Look at the wars in iraq,afghanistan,gaza,and mexico are all using sentry guns,UAV's/drones,UGV's ( unmanned ground vehicle's ),and UNV's ( unmanned naval vehicles's i think that they're called ). instead of talkin 'bout Gun,Nukes,Tanks,and countries. ROBOTS...are all ready being fitted with god knows what kind of weapons like from 7.62mm MG's - 12.7( 50.cal ) MG's even the US army is thinking fo putting the THEL ( tactical high energy laser ) system on a UGV or UAV. Think about it, imangin a small drone about the size of an RC toy packin with a terminator-style weapon and zappin the enemy in half,.....THATS SOME SCARY SHIT YO.....and i could see the future of next. hope'in that a supercomputer wont go all haywire on us and start controlling these deadly robotic warmachines. DAMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMN !!!
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Old 2010-02-18, 17:48   Link #123
amaius
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Join Date: Apr 2008
Location: Miami-gardens,florida
ah! crap i forgot to put the Black knight UGV
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Old 2010-02-19, 07:48   Link #124
Kamui4356
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Join Date: Nov 2003
Quote:
Originally Posted by Jinto View Post
Besides even the tsar bomba (50/75 Mt) did imo not have a very strong blast.
Not a strong blast? From wiki:

"The fireball touched the ground, reached nearly as high as the altitude of the release plane, and was seen and felt almost 1,000 kilometres (620 mi) from ground zero. The heat from the explosion could have caused third degree burns 100 km (62 miles) away from ground zero. The subsequent mushroom cloud was about 64 kilometres (40 mi) high (seven times the height of Mount Everest) and 40 kilometres (25 mi) wide. The explosion could be seen and felt in Finland[citation needed] , breaking windows there and in Sweden.[citation needed] Atmospheric focusing caused blast damage up to 1,000 kilometres (620 mi) away. The seismic shock created by the detonation was measurable even on its third passage around the Earth.[6] Its seismic body wave magnitude was about 5 to 5.25.[7] The energy yield was around 7.1 on the Richter scale, but since the bomb was detonated in air rather than underground, most of the energy was not converted to seismic waves."

If that's not a strong blast, I don't know what is, short of an asteroid impact like the KT event.
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Old 2010-02-19, 14:19   Link #125
Jinto
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Join Date: Feb 2004
Location: Fürth (GER)
Age: 34
Quote:
Originally Posted by Kamui4356 View Post
Not a strong blast? From wiki:

"The fireball touched the ground, reached nearly as high as the altitude of the release plane, and was seen and felt almost 1,000 kilometres (620 mi) from ground zero. The heat from the explosion could have caused third degree burns 100 km (62 miles) away from ground zero. The subsequent mushroom cloud was about 64 kilometres (40 mi) high (seven times the height of Mount Everest) and 40 kilometres (25 mi) wide. The explosion could be seen and felt in Finland[citation needed] , breaking windows there and in Sweden.[citation needed] Atmospheric focusing caused blast damage up to 1,000 kilometres (620 mi) away. The seismic shock created by the detonation was measurable even on its third passage around the Earth.[6] Its seismic body wave magnitude was about 5 to 5.25.[7] The energy yield was around 7.1 on the Richter scale, but since the bomb was detonated in air rather than underground, most of the energy was not converted to seismic waves."

If that's not a strong blast, I don't know what is, short of an asteroid impact like the KT event.
The area effect of a blast and the actual pressure per square meter are completely different things. Just because it is extremely large and incredible hot, does not mean it causes a very high pressure shockwave. Most bunkers (even overground) would survive the blast. The area effect might be huge but the per area pressure the shockwave generates is below things like what bunker busters or similar devices do (e.g. very high velocity kinetic/ultra fast expanding explosives - shockwaves).
In the case of nuclear weapons - that generate the shockwave because of sudden temperature changes in the atmosphere (similar to lightning but some orders of magnitude more powerfull) the shockwave is limited by the laws of hydrodynamic separation. This shockwave might still be extremely potent in the center of the nuclear explosion, but its energy per area drops at the square of the distance to the center of explosion (larger fireballs extend this radius). Anyway an ultra high speed impact of an asteroid will generate far more intial pressure (starting when it decends).
Now in an environment without air (as in space) there would not be any significant shockwave when using the radiation of a nuclear device. A high velocity object would certainly not generate much of a shockwave either in space, but the point is, that a large part of its' kinetic energy will affect the target, while most of the heat of the nuclear device is a) radiated into outer space and b) the radiation that actually hits the target is only available for some milliseconds (it is harder to maintain a nuclear fire/explosion in space).
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Old 2010-02-23, 18:18   Link #126
amaius
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Join Date: Apr 2008
Location: Miami-gardens,florida
in the wake of IED's,Land Mines,and Roadside Bombs, thier has been a major demand for MRAP's(mine resistant armored protection) and uparmored vehicles for each country.But in war of mines and IED's acually started in africa, during the angolan war and the south african border war, the south african national defense force (army) had a need of vehicles that needed to withstand land mines and booby traps and they went to major a south african corperation called Reumech OMC in cooperation with victers defence system and went on creating the Casspir and the RG-31 MRAPs. and then on, in the war on terrorism countries like the USA,UK,Austrailia,Russia,Isreal,India,Germany,Fran ce,Poland,Serbia,and Jordan. the MRAP apc's have been so popular, even the FBI HRT/SWAT even has thier own MRV.and with increase technology in armor proctection MRAP's will be the main vehicles that will proctect soldiers and marines and swat personnel in the forseable future
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