what is the vertex of a tornado?
348533
I beleive its Vortex. The center of the Tornado
133564
The coordinates of the vertex of a parabola \ny = ax^2 + bx + c is\n[-b/2a , (4ac - b^2)/4a]\nJust substitute and you will get\nV(2 , -7)
447507
The main hazards of a tornado include extremely high winds, flying debris, and sometimes the associated weather phenomena, such as large hail and heavy rain. The extremely high winds pick up debris, causing seemingly harmless things such as small pieces of styrofoam or wood to become lethal projectiles. The winds can also cause extensive structural damage. The storms associated with tornadoes also bring hazards such as baseball-sized hail and intense rain around the vicinity of the tornado.
1128213
A tornado is not just wind, the fact that you can see them is either a if it drags condensation down witth them when they form (condensation funnel), or stir up dust and debris when they contact the ground. These "clouds" are actually rapidly spinning vortices (if you dont know it, look it up), that can produce winds in excess of 300 mph on the Fujita Scale (Ditto), and the stuff they can pick up and carry with them..... well, I think that about covers it.
928319
I've never heard it been used in weather but some most-known related slang terms to tornadoes are: twister ,whirlwind ,wedge , funnel , gustnado, landspout, willy-willy , or rope.\n\nI hope thats enough.
481590
Tornadoes are created from severe Thunderstorms. They occur when a high pressure front meets head on with a low pressure front. No where is this more evident than in our mid-west, otherwise known as tornado alley, from the Canadian provinces to the Gulf of Mexico. Here, the Siberian express from Canada meets the warm tropical front from the Gulf of Mexico.
145471
Tornados don't have a season, unlike hurricanes, they occur year round in different parts of the country. Generally, most tornadoes occur in the Spring time and into Summer, in an area called "tornado alley", where warm air from the Gulf of Mexico clashes with cold air from Canada, and the Jetstream is usually over those 2 as well and creates a spin to the atmosphere, to initialize the tornadic activity.
105363
For a tornatdo to form, there must be cold air, warm air, horizontally spiraling air (casued by the coriolis effect), flat land, no water present. There must be an oncoming wind, and cold and warm aiar that is colliding from the northern and souther latitudes. When the masses of air meet, the warm or moist air will rise, since its density is lower than cold or dry air, ando this will create an upward motion. Now, the oncoming wind will come along (it will be spiraling already), and when it makes contact with the area in which the air masses met, the spiraling wind will basically be violently set upright and so a tornado will form. In the northern hemisphere, the winds will go in a counterclockwise direction and in an inward spiral. (This will be partailly due to the Coriolis effect& if you're in the southern hemisphere, the winds will go in a clockise direction). This is the basic science of tornadoes, as i have just learned this year in my Earth Science course.
1102714
yes.\n\nAt least the great majority of tornadoes rotate counterclockwise \n(as do all low-pressure systems) in the northern hemisphere, and clockwise in \nthe southern hemisphere, for the reason (coriolis force) given by Eric \nPeterson in response #1.  But occasionally, it would seem, northern hemisphere \ntornadoes do rotate clockwise:  S. Flora's book "Tornadoes of the United \nStates" cites an 1890 article in the American Meteorological Journal.  Its \nauthor, a J.P. Finley, states that, of 550 American tornadoes he studied, 29 \nwere deemed to have rotated clockwise.  I have not been able to find any \n"modern" study of this question.  But I believe it could be true. The region \nof swirling air that contracts to become the tornado is not itself large \nenough in extent to have its rotation dictated by the coriolis force; rather, \nit "inherits" this tendency from the great masses of air whose movement sets \nthe stage for the storms and any associated tornadoes. If the study cited is \ncorrect and representative, on occasion the direction of rotation is set by \nsome other factor, perhaps the topography in the area where the tornado forms, \nfor example.
1123405
This is a good one.\nAccording to the definition in geometry a vertex is a corner.\n\nA triangle has 3 vertices \nA square has 4 vertices  \n \nSo far it is a piece of cake.\n\nSo how many corners does a sphere have? \n\nIf we have to approximate a sphere (actually I’m thinking of a circle but for our argument it is good enough) we would need infinitely many edges (or sides) and therefore would generate infinite number of vertices since a vertex is formed between every two edges. \n\nSo a sphere has infinite number of vertices. \n\nSome people would say that it has a zero vertices since there are no corners to a sphere. But now you know better don’t you?
947663
Like a tornado funnel in a rainbow of colors..
975582
You can't tell by just stepping outside, unless you see a funnel cloud or something.  Tornadoes are usually created from cold fronts or occluded fronts.  You have very warm air ahead of the front, and very cool air behind it.  The difference in the air temperature pushes air up, creating an updraft.  Bottom line, tornadoes are caused by warm and cool air in the same area.  And you have to have very strong winds in the upper atmosphere.  70 to 80 mph.  That helps with the updraft.
194439
The Hallam Nebraska F4 tornado of May 22, 2004 was the biggest on record.\n\nhttp://www.spc.noaa.gov/faq/tornado/\n\nhttp://www.spc.noaa.gov/faq/tornado/hallamap.jpg
858929
I don't live in U.S.A., but I can't tell you for sure that the tornados aren't named as hurricanes or typhoons. A tornado has a scale of intensity. The Fujita Scale. A tornado is classified as Category F0 to F5. A tornado F0 is a tornado that produces light damage. Some damage to chimneys; branches broken off trees; shallow-rooted trees pushed over; sign boards damaged. The wind speed has to be less than 76 mph. A F1 tornado has some moderate damage. The lower limit is the beginning of hurricane wind speed (73 mph); peels surface off roofs; mobile homes pushed off foundations or overturned; moving autos pushed off the roads; attached garages may be destroyed. The maximum limit is 112mph. A F2 tornado produces considerable damage. Roofs torn off frame houses; mobile homes demolished; boxcars overturned; large trees snapped or uprooted; light-object missiles generated. It's classified between 113 and 157 mph. A F3 tornado has severe damage. Roofs and some walls torn off well-constructed houses; trains overturned; most trees in forest uprooted; heavy cars lifted off the ground and thrown. Wind speed parameters are between 158 and 206 mph. A F4 tornado produces devastating damage. Well-constructed houses leveled; structures with weak foundations blown away some distance; cars thrown and large missiles generated. The winds blow between 207 and 260 mph. Finally, a F5 tornado has an incredible damage. Strong frame houses lifted off foundations and carried considerable distances to disintegrate; automobile sized missiles fly through the air in excess of 100 m (100 yd); trees debarked; steel reinforced concrete structures badly damaged; incredible phenomena will occur. That's all. I hope that this helped you.
526722
float ComputeEdgeCollapseCost(Vertex *u,Vertex *v)\n{\n   // if we collapse edge uv by moving u to v then how\n   // much different will the model change, i.e. the\n   // "error".\n   float edgelength = magnitude(v->position - u->position);\n   float curvature=0;\n   // find the "sides" triangles that are on the edge uv\n   List<Triangle *> sides;\n   for(i=0;i<u->face.num;i++)\n   {\n      if(u->face[i]->HasVertex(v))\n      {\n         sides.Add(u->face[i]);\n      }\n   }\n   // use the triangle facing most away from the sides\n   // to determine our curvature term\n   for(i=0;i<u->face.num;i++)\n   {\n      float mincurv=1;\n      for(int j=0;j < sides.num;j++)\n      {\n         // use dot product of face normals.\n         float dotprod = \n            u->face[i]->normal ^   sides[j]->normal;\n         mincurv = min(mincurv,(1-dotprod)/2.0f);\n      }\n      curvature = max(curvature,mincurv);\n   }\n   return edgelength * curvature;\n}\n\nvoid ComputeEdgeCostAtVertex(Vertex *v)\n{\n   if(v->neighbor.num==0)\n   {\n      v->collapse=NULL;\n      v->cost=-0.01f;\n      return;\n   }\n   v->cost = 1000000;\n   v->collapse=NULL;\n   // search all neighboring edges for Òleast costÓ edge\n   for(int i=0;i < v->neighbor.num;i++)\n   {\n      float c;\n      c = ComputeEdgeCollapseCost(v,v->neighbor[i]);\n      if(c < v->cost)\n      {\n         v->collapse=v-neighbor[i];\n         v->cost=c;\n      }\n   }\n}\n\nvoid Collapse(Vertex *u,Vertex *v)\n{\n   // Collapse the edge uv by moving vertex u onto v\n   if(!v)\n   {\n      // u is a vertex all by itself so just delete it\n      delete u;\n      return;\n   }\n   int i;\n   List<Vertex *>tmp;\n   // make tmp a list of all the neighbors of u\n   for(i=0;i<u->neighbor.num;i++)\n   {\n      tmp.Add(u->neighbor[i]);\n   }\n   // delete triangles on edge uv:\n   for(i=u->face.num-1;i>=0;i--)\n   {\n      if(u->face[i]->HasVertex(v))\n      {\n         delete(u->face[i]);\n      }\n   }\n   // update remaining triangles to have v instead of u\n   for(i=u->face.num-1;i>=0;i--)\n   {\n      u->face[i]->ReplaceVertex(u,v);\n   }\n   delete u;\n   // recompute the edge collapse costs in neighborhood\n   for(i=0;i<tmp.num;i++)\n   {\n      ComputeEdgeCostAtVertex(tmp[i]);\n   }\n}
234935
Short answer, they are called "tornado;" as you will see below, tornadoes usually rotate in a counter-clockwise direction in the northern hemisphere, clockwise in the southern.  In the rare event of it spinning in the opposite direction, which I believe was the nature of your question, it is called an "anticyclonic tornado."\n\nTornadoes normally rotate in a cyclonic (counterclockwise) direction in the northern hemisphere, as the warm air in which thunderstorms usually form sweeps north and jet streams come from the west, creating a situation in which the storms rotate. In the northern hemisphere, this rotation is counterclockwise, and in the southern hemisphere, clockwise. The tornadoes usually rotate the same way. Sometimes opposite direction swirls develop under a thunderstorm. About 1 in 100 tornadoes in the northern hemisphere rotate in an anticyclonic direction.\n\nI hope this helps.
597648
y= -4x^2+8x-1\ny = -(4x^2-8x+1)\ny = -[(2x-2)^2 - 4 + 1]\ny = -[(2x-2)^2 - 3]\ny = 3 - (2x-2)^2\n\nSo the vertex is (1,3) and it is a maximum point.