I need to know how landslides are triggered by bulldozers.
124260
If you are referring to directly triggering a landslide, there are two possibilities.  The first is that the bulldozer's weight could push down on loose ground causing it to break free and slide.  The second, much more remote chance is that the vibrations from either the engine or the earth moving could cause already loose ground to slide.\n\nIn an indirect manner, a bulldozer could cut into the foot of a slope leading to the weight of the earth above the cut to push down and slide into the cut area.  This is where retaining walls come into play.  The prevent the ground from sliding down to fill in an area that has been cut away.
651044
if its somewhat large, or near something very important, i would recommend going to a local geotechnical/ civil engineer.  \n\na few hundred bucks may be worth it not falling over, and then you are out the wall and the money.  better safe than sorry.\n\nan engineer will review site and soil conditions to give you a quality end product, and a guarantee
633035
The simple answer is to have a mechanism for absorbing the impact of the fall. What to build depends on what materials you are restricted to.\n\nThere are several ways to go about it. Design a super-structure (the outside part) that crumples when hit. Suspending the egg is also a great idea (as was already suggested) If you can't or don't want to use a sock or stocking, using some kind of thick substance like gelatin would work well. Parachutes also work very nicely, I've seen some cool ones that worked like helicopters, spinning to slow down the descent. If you want a better answer I suggest posting whether you are restricted to certain materials.
260863
It says it right there, all you have to do is explain how it [whatever IT is] erodes away rocks and creates caves. Talk about how it breaks down the rocks, calcium carbonate, and hollows everything out. Also speak of the formation of stalagmites.
552716
Depends what medium is eroding it.\nI think you're looking for the hardness scale.
89858
They actuate a type of selonid \n1 should be Hot and 1 should be ground
257424
*\nYes! The Hoosier state has trembled in the wake of earth waves generated by powerful earthquakes in the past, and will, no doubt, tremble again in quakes that are yet to come. These pages briefly describe earthquakes in our past, what causes our earthquakes, what is being done to reduce losses that will result from future quakes, and what you should do before, during, and after an earthquake.\n\n\nEarthquakes in Indiana  [New Window] \nArticle about the history and future of earthquakes in Indiana.\nVerified by a Netscape Security Partner: Netscape Security Center http://igs.indiana.edu/geology/earthquakes/eqinindiana/index.cfm
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The first link provides current and historical information regarding the fault.  The second link is to the history channel's web site which contains a brief overview of the Mega Disaster's episode on a possible future fault movement.\n\nhttp://quake.ualr.edu/public/nmfz.htm\nhttp://www.history.com/minisite.do?content_type=Minisite_Episodes&content_type_id=1435&display_order=3&mini_id=1401
445238
go to\n\nhttp://earthquake.usgs.gov/\n\nits a great site - tell you when, where and how big
589126
I think you'll have a hard time finding even one fatality outside of Hollywood movies. People are even more buoyant in quicksand than they are in water. Consider how much greater the density of sand and water must be than just water. Quartz has a density of 2.6, and water 1, so a quicksand is likely to be nearer to 2.6 than 1. Here is what some researchers found: \n(I quote from msnbc link below) "The density of an average human body is about 62 pounds per cubic foot, which is less than quicksand's 125 pounds per cubic foot." \n Besides that most natural quicksand is not deep enough for anyone to sink completely into it. \n\nWhat you might find are casualties from liquefaction, which is caused by earthquakes shaking soft water-saturated ground, often sandy. However, most of the casualties will be the result of buildings sinking and collapsing into soft wet sand substrates, and are not likely to be from someone actually sinking in sand. \nHere's a good liquefaction website:\nhttp://www.ce.washington.edu/~liquefaction/html/main.html\n\nAnother place where something resembling quicksand causes fatalities are volcanic lahars. These are the consistency of wet concrete and move very quickly down slopes destroying houses and anything in their path. No one gets a chance to walk across one while it is moving, so a fatality related to a lahar is more like being buried under a landslide.  \nHere is an article on lahar hazards:\nhttp://www.agiweb.org/geotimes/apr04/feature_MountRainier.html\n\nHere is an article where researchers found the a mass the equivalent of a human body was impossible to sink in quicksand:\nhttp://msnbc.msn.com/id/9516779/
563956
maybe this will help you.\n\nhttp://www.scarborough.k12.me.us/wis/teachers/dtewhey/webquest/nature/seismic_waves.htm
116826
The only way to prevent mudslides is by growth of plants and such. Usually the problem is that plants are burnt away in brushfires causing root systems to rot letting water that saturates the ground to expand the ground and at some point the weight becomes too much to bear and the ground gives
353641
http://stencilease.com/db/display.asp?input=1497\nhttp://www.eosdev.com/EosBackFallingLeaves.htm
364484
It's called 'impulse' and any good, lower division, physics book will have an explanation of what it is and how it works.\n\n\nDoug
505833
Aeolian erosion, which comes under the general heading of weathering.  \nWater and gravity tends to be more powerful agents of erosion when it comes to mountains though.
634988
National Geografic website has a lot of information about it. \nIf you go to the linlk provided and then to the section of Natural Forces, you will find a lot of material to support your research. \n\nSecond link is about simulate and understand these events, explaning how it works at all their levels. You can find it to Earthquake, Hurricane, etc. I've putted the link to Vulcanoes\n\nGood luck
662082
Earthmoving: A general introduction to types of earthmoving equipment and engineering fundamentals of earth hauling ...\n\n\nmethods for construction of projects, including earthmoving, paving, steel and concrete.  For the rest of this article and other excellent sources of your information, consult these lists:\nhttp://search.yahoo.com/search?p=engineering+fundamentals+of+earthmoving&prssweb=Search&ei=UTF-8&fr=FP-tab-web-t403&x=wrt\nhttp://www.google.com/search?hl=en&q=engineering+fundamentals+of+earthmoving&btnG=Google+Search