How does a spider weave a web.How doeas it connect between two horizontal points.?
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Spiders have several spinneret glands located at the spider's abdomen which produce the silken thread. Each gland produces a thread for a special purpose. Seven different gland types have currently been identified, although each species of spider will possess only a few of these types, never all seven at once.\n\nNormally a spider has three pairs of spinnerets, but there are spiders with just one pair or as many as four pairs of spinnerets, with each spinneret having its own function.\n\nWebs allow a spider to catch prey without having to expend energy by running it down. Thus it is an efficient method of gathering food. However, constructing the web is in itself an energetically costly process due to the large amount of protein required, in the form of silk. In addition, after a time the silk will lose its stickiness and thus become inefficient at capturing prey. It is not uncommon for spiders to eat their own web daily to recoup some of the energy used in spinning. The silk proteins are thus 'recycled'.\n\nSome spider silk strands are stronger than steel strands of the same thickness; the micro structure of this material is under investigation for potential applications in industry.
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They know which strands are the sticky ones and which aren't.  I think it's impossible for a spider to stick in its own web.\n\nhttp://arachnophiliac.co.uk/burrow/whydoesnt.htm
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Spiders!!!!  How can anything have 8 legs when 6 is enough???
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It has nothing whatsoever to do with blood loss. Obviously, since spider that are poironed and suffer no blood loss exhibit the same pose.\n\nThe answer itself is simple, but you need a bit of background information first.\n\nMost animals have leg muscles that come in pairs. One muscle causes the leg to bend, the other muscle causes the leg to straighten. That’s the system used by humans for example, with the muscles at the front of the thigh straightening the leg, and the muscles at the back of the thigh bending the leg. A similar system of paired muscles is also used by insects.\n\nSpiders are different. The only muscles they have in their legs cause the legs to bend. In order to straighten out their legs spiders have to pump water from their body out into the legs to straighten them hydraulically.\n\n\nThat’s half the story. The other half of the story is that after animals die their muscles contract. That might seem odd, but muscles are designed backwards, so they require energy to stay relaxed. When an animal dies the muscles run out of energy and the muscles contract and stay contracted. In most animals when the muscles contract after death they all contact. The muscle that causes the leg to straighten contracts, and the muscle that causes the leg to bend contracts.  The two muscles work against each other and the animal becomes literally as stiff as a board, locked into the position in which it dies by the contracted muscles : rigor mortis. \n\nYou often hear them referring to “rigor” on shows like CSI when they are trying to establish a time of death. That is what they mean, that the body has gone stiff because all the muscles have contracted.\n\nOK, so now we have the two important facts: \n\n1)Spiders don’t have paired muscles in their legs.\n2)Animal muscles contract after the animal dies.\n\n\nFrom their you can probably work out the answer by yourself. Spiders don’t; have paired leg muscles. The only leg muscles they have cause the legs to contract and fold up under the body. There is no other half of the muscle pair to oppose that contraction.\n\nAs a result when a spider enters rigor the legs move. They fold in as tightly as possible because that is the direction that the single muscles pull. And as a result spiders are always found with their legs pulled up under the body. It’s the position that they have to adopt in rigor because they lack paired muscles in their legs.\n\nAs for why spiders are about the only animals in the world that don’t have paired muscles on their limbs, that is another story altogether.
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HOW A RAINBOW FORMS:\nWhen light travels from one medium to another, it bends. In other words, it changes direction and moves at different speeds in different mediums. This property of light is called “refraction”. \nWe also know that white light is made up of different colours. Different colors of light have different frequencies. Except in vacuum and air, they travel at different speeds in different mediums.\nIf you were to allow a beam of light to pass through a simple prism, it will bend when it enters the prism, when it leaves the prism it bends again. The different colours of the white light travel with different speeds inside the prism. The slanted surfaces of the prism makes the different colours emerge separately, thus in addition to bending light as a whole, a prism separates white light into its component colors. This splitting of light into its component colours is called dispersion, where prism is a dispersing element.\nThis is exactly what happens when the sun rays hit droplets of water. When the sunlight strikes a raindrop, the light is refracted (bent) because the light is moving from one medium(air) to another( water). Drops of rainwater can disperse light in the same way as a prism.. When the light comes out of the water droplet, the sun's rays (white light)have now been split into their component wavelengths (colors). In this way, each individual raindrop behaves just like a prism, dispersing white sunlight into its seven component colors and a rainbow is formed. \nThe rainbow we see is thus a result of many, many raindrops bending the sun's rays.\n\nWHY U SEE 5 COLORS:\nDont worry much! there are many colors in rainbow but we see only those who are flowing in a great band. i mean which have more thickness! some colors dont have much thickness there, so it becomes tough to see them. we generally see 5 colors where it is said that rainbow have 7 colors. sometimes we see only 3! it depends on rainbow too, and changes from rainbow to another! depends on the sun and the intensity of rain too.\n\nBut to take precautions u can go and see a doctor!
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web is like a spider web its all over, site is like a place (site) the web is a web of sites
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The thickness of a strand in a spider's web is about one micron thick, or one hundred times finer than a human hair."
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like it's already been stated, with spiders the female tends to be larger, also in some cases the female will eat the male when the fertilization is complete.\n\nBut as for a special chamber inside the female to store the male...never heard of that
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In order to climb a vertical surface there must be enough places for the spider's feet to latch onto.  Glass has very few rough spots, which makes it very difficult for a spider to scale without using a web.
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No only the females are black with the red hour glass.  The male of the species are a brownish color and do not have the red.  You can always recognize their webs.  They are more random not a tight weave as some spiders and the strands are very strong.  I hear they kill their mate after mating and that is the reason for the black widow name of the species...smart spider.
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Short Answer:\nThe diagonal line or hypotenuse is not a straight line.  It bends either way thus both figures are NOT triangles.\n\nLong answer:\n\nThe two diagrams are not perfect triangles; they are quadrilaterals. Why is that significant? Look at the "diagonal line" on each of the diagrams. You may be able to see, if you look closely, that the supposed diagonal line is not really a straight line. Rather, it's two connected segments (two straight line segments) with a slight angle to it where the two segments meet.\n\nThe top diagram bends in a convex manner, so that there is slightly more area contained below the diagonal. In the bottom diagram, the bend is in the opposite direction.\n\nTo help you see this better, look at the green traingle in the top diagram. It's dimensions are 2 units high, and 5 units long. The Red triangle is 3 units high. In order for the two line segments that make up the combined diagonal to be a straight line, the Red triangle would therefore need to be 7.5 units long (2/5 = 3/x; therefore x=7.5). Instead, it's 8 units long. If that Red Triangle were only a half a unit shorter along the base, then the diagram would all line up, and we wouldn't be trying to solve this problem!\n\nThe four pieces that make up the upper diagram "appear to fit exactly" on a triangle that is half of a rectangle 13 units long and 5 units high. (Count the squares: 13 across, 5 down.) If "appearances are correct", then that would imply that the total area of the four pieces is half of 13x5, or half of 65. So you would think that the total area of these four pieces is 32.5 square units. Let's total them up and see:\n\nIn the top diagram, you can see that the two irregular pieces combine to make a 3x5 rectangle. So these two pieces are 15 square units (you can count the squares, as well! One is 7 squares, the other is 8.) That's part of our total.\n\nThe Red Triangle is half of a 3x8 rectangle. So it's 12 square units. So add 12 to our total.\n\nThe Green Triangle is half of a 2x5 rectangle. So it's 5 square units. So add 5 to our total.\n\nTotal Area of the four pieces is 15+12+5 square units, or 32 square units. So the top quadrilateral is covering only 32 squares out of the 32.5 square units that a triangle would cover. It LOOKS LIKE it covers 32.5 squares, but really it only covers 32!\n\nLet's check the bottom diagram. Obviously the four pieces only cover 32 square units, using the same math as above. There's a 33rd square which is empty.\n\nIf you take the top diagram, and rotate it 180 degrees, so that it fits perfectly on the bottom diagram, you'll see that the red triangles are butted against each other, as well as the green traingles. Therefore, if the top diagram has a slight angle caused by the line segments, the bottom diagram has a slight angle exactly complimentary to the top one. Therefore, if the top diagram undershoots the 32.5 square units by just a half of a square, then the bottom one OVERshoots it by half a square.\n\nAdd up the two half squares, and you have the whole hole.\n\nFour pieces that cover 32 squares, plus four pieces that cover 32 squares, plus one empty square equals 65 squares, which is the area of rectangle 13 units long and 5 units high.\n\n(7+8+12+5) + (7+8+12+5) + 1 = 13 x 5\n\nClear as mud, eh?
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its the middle of a angle like if da two lines combine the pointwere they combine is da vertex..........and you cant graph vertexs
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This can be confusing because there are several types of forces at work. It is easier to picture a large rubber band than a rope.\n\nThe first force is "reactive tension" which is parallel to the rope, and is the force used in calculations at the body being moved. \n\nThere is also "internal tension" in the rope which describes the forces acting within the rope itself. These forces are typically both radial and longitudinal to the rope.
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The rope is the hypotenuse of the triangle you need to analyse so it's going to be sin60 or cos60 times 75N. An easy way to decide which: as a test, consider if the angle were 90. The horizontal component would be 0. Is sin90 or cos90 = 0? Cos, right? So the component of the force parallel to the floor is cos60 times 75N.
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everything else is a single unit that is textured. Hair is multiple units that are relitively untextured. When you tie hair in a knot, not all of the hairs have something to pull against. When you tie a rope, the rope is caught by itself and stays, but the hairs in the middle fo the knot are really just being curled around a bit, but dont have anything to bite into to keep them like that, they just slide right past each other. a knot needs to lock around itself to stay and there are just too many hairs not doing that for you to be able to tie your hair up like that.
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No string in this case is ever straight.\n\nThere are two forces acting on each bit of the string. There is the tension in the string because it is being pulled - usually more or less horizontal. And there is the force of gravity - straight down.\n\nGravity causes the sting to curve. The shape of the curve is called a catenary. The curve is higher if the tension in the string is higher. It is more noticeable if the string is longer.\n\nSo the string attached to the door is curved, but it is short so the curvature is small and hard to see. The string to the kite is long.
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Actually, you erred a bit on the question, in favor of politeness.  :)\n\nThe spinneret organs of most spiders are located in the same part of their abdomens as their excretory spiracles are.  Meaning, in plain english, an anatomically correct Spider-Man would be shooting webbing, well, from his *sphincter*.  Between the buttcheeks.  Out of the hip pocket.\n\nHe'd be pulling it out of his *ass* in other words.  *rofl*  =))  Which would make it *harder* for him to be a hero, but has *immense* prank potential if you ask me (not that anyone does, of course).\n\nNot that Peter Parker did pranks quite like that.  Now if this were *Adam Sandler's Spider-Man* I could see it.\n\nWhich is the kicker....we can talk all night about anatomy and how webbing should come out of his navel or his groin or his rear end....but in the end, thing is, whether Parker has the mechanical web-shooters or not, the truth is that the *guy* would *not* have had the nerve to *swing around* by his crotch or his tush, it would have ruined the character.....\n\nSo yeah, sometimes you have to sacrifice accuracy for storytelling...what else is new?  ;)  It happens all the time in comics, so why should movies be so different?