the butterfly's wings move because of wind, gravity or static electricity?
90063
None of the above.  Just as you move your arms, so the butterfly moves its wings.
1068629
I think you are talking about the 'Butterfly Effect' in weather forecasting.   With all the wonderful computers they have to help to forecast the weater, one of the staff was sitting in his garden when a butterfly flew past him.  He suddenly realised that the air movement caused by the wings can cause air movement which can increase over time, enough to cause a major storm in another part of the world.....................
70069
butterfly effect without a doubt.
504220
It's a little more complicated than that, but it's one of those funny factoids tossed about in any discussion of chaotic systems (such as the weather).\n\nThe idea is that micro-currents of air can influence subtle movements of larger currents of air, which in turn influence larger currents and so on, until you get a hurricane.  This has been proven by mathematical models of these chaotic systems, showing that one of the original influences of hurricane formation was a microcurrent of air of equivalent force to a butterfly flapping.\n\nBut to say A "caused" B is figurative; actually A only influenced the creation of B.  And it certainly doesn't mean that every time a butterfly flaps, we get a hurricane.
144895
Wind. \n\nHow simple was that?
76789
Likely happens due to static electricity grabing the hair.  All the rubbing on the front likely creates the force and the weak her likely slips off.
217748
Here's a bunch:\nhttp://images.google.com/images?q=flying+insects&hl=en
567053
Wind is the motion of microscopic particles from an area of high pressure to an area of low pressure.  You can feel the particles bumping against your skin, but they are too tiny to see.  Try this:  sometimes you can see light ripples from heat rising off the ground.  This is light hitting a medium (air) and being momentarily refracted from particle motion.  In this case, you can see wind!
141770
To answer this question there are two principles of physics involved and to really understand it is a little difficult.\nThe shape of the wing determine the lift on the wing. The birds know it very well they know how to fly.\nBy making the top of the wing a curves and the bottom a straight line,we obtain two different traveling distances for the air fluid to flow.The angle which the fluid flows is called the angle of attack and in order to fly the airpla must have the proper andgle of attack least it stalls.\n\nBernoulli's principle says that if the velocity of the moving fluid is increased the pressure is decreased.\n\nThe velocity of air over the top of the wing is greater than the air flowing under the wing.Because the air travels a longer distance for the same time as the air floweing below the wing.Hence the pressure is less on top of the wing.\n\nBy Newton third law the bottom of the wing gets the greater lifting power.\nTherefore the statement in the first line of you question is correct.\nSo the plane mimics the flight of a bird.
846551
Adaptation of flight.
157960
"Wind is the roughly horizontal movement of air (as opposed to an air current) caused by uneven heating of the Earth's surface."\n\nThe sun heats up the earth's surface, the hot air rises while the cool air sinks, therefore create air movement - which is called wind.
1025041
It will continue to hover because the air that it's wings are beating against is moving at the same speed as the train. This of course is assuming that the premise requires that all windows are shut and the air is still.
1168958
There is no one reason why bugs are attracted to light. All of the following are possible in my opinion:\n\n1) Bugs use light to navigate. The moon is a very long way from us by normal standards and the light rays which reach the earth are virtually parallel. By flying at a constant angle to these rays it is possible over a short period of time to fly in a straight line. When an insect is close to a lamp the rays are not parallel, but divergent. The effect of keeping the rays at a constant angle will be to fly round the light source.\n\n2) Many bugs see ultraviolet light and may be attracted to flowers at night which reflect ultraviolet patterns using moonlight. Lights which emit UV rays may therefore attract such insects.\n\n3) Both or one of the above reasons are often given by entomologists to explain the attraction to light. It is also possible, although I have never seen research on this, that bugs are attracted to the heat of the light source.
152209
wind. the speed of the current traveling through the lines. when they pass each other they make contact.
24264
Electric current flows between two points, if the points have different potentials. When a bird touches a wire, the bird will have the same potential as the wire.\n\nIf the bird reaches two wires at the same time, there can be different potentials, so the bird can be 'electrocuted'. That's why the wires need to be far enough from each other.\n\nIf somebody reaches the wire and the ground at the same time, there can also be different potentials... That's why the wires need to be far enough from the ground.
254997
From an entomologist friend, about flight "motors": The dragonfly is one that dates back to very ancient times. It is different from more modern insects in that its wings are powered by essentially vertically oriented internal muscles and pivoted at the exoskeleton, kind of the way you would design a simple mechanical flapping flyer. The modern design uses a very different concept; thoracic muscles distort plates of the thorax, whose in-and-out motions at the edges are coupled to wing motion.\nOther differences are the actual motion of the wings and how they generate lift and thrust. You can find out more, including the suspected origin of the wings and the two basic wing motions, at the referenced web page.
877409
Hi,\n\nGalileo was faced by similar queries and this is his response:\n\nShut yourself up with some friend in the main cabin below decks on some large ship, and have with you there some flies, butterflies, and other small flying animals. Have a large bowl of water with some fish in it; hang up a bottle that empties drop by drop into a wide vessel beneath it. With the ship standing still, observe carefully how the little animals fly with equal speed to all sides of the cabin. The fish swim indifferently in all directions; the drops fall into the vessel beneath; and, in throwing something to your friend, you need throw it no more strongly in one direction than another, the distances being equal; jumping with your feet together, you pass equal spaces in every direction. When you have observed all these things carefully (though there is no doubt that when the ship is standing still everything must happen in this way), have the ship proceed with any speed you like, so long as the motion is uniform and not fluctuating this way and that. You will discover not the least change in all the effects named, nor could you tell from any of them whether the ship was moving or standing still. In jumping, you will pass on the floor the same spaces as before, nor will you make larger jumps toward the stern than toward the prow even though the ship is moving quite rapidly, despite the fact that during the time that you are in the air the floor under you will be going in a direction opposite to your jump. In throwing something to your companion, you will need no more force to get it to him whether he is in the direction of the bow or the stern, with yourself situated opposite. The droplets will fall as before into the vessel beneath without dropping toward the stern, although while the drops are in the air the ship runs many spans. The fish in their water will swim toward the front of their bowl with no more effort than toward the back, and will go with equal ease to bait placed anywhere around the edges of the bowl. Finally the butterflies and flies will continue their flights indifferently toward every side, nor will it ever happen that they are concentrated toward the stern, as if tired out from keeping up with the course of the ship, from which they will have been separated during long intervals by keeping themselves in the air. And if smoke is made by burning some incense, it will be seen going up in the form of a little cloud, remaining still and moving no more toward one side than the other. The cause of all these correspondences of effects is the fact that the ship's motion is common to all the things contained in it, and to the air also. That is why I said you should be below decks; for if this took place above in the open air, which would not follow the course of the ship, more or less noticeable differences would be seen in some of the effects noted.\n\nAlthough, this seems obvious to us now in its day it was quite startling. But it is the same for an Astronaut on a space walk. His craft appears stationary to him, although both he and it a traveling at great speed. So, we judge that something is moving only by its movement relative to us or some other object.\n\nThis, if you like, is Galilean relativity, we judge objects to be moving only if they are moving relative to our frame of reference.