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When an airplane is flying, how high are the wings displaced relative to the plane?
Ok, for example, take a 747. When it's on the ground, the wings "appear" to be more or less parallel to the ground. There's some flexibility built in to the wings, such that when it's in flight, the wings curve upwards. I'm looking for just a general idea of about how many feet that is---or, what the actual tolerance is "total" (i.e., 20 feet up/down relative to the plane). Thanks.
2 AnswersEngineering1 decade agoHow, exactly, does a chameleon change its color to match its environment?
Does the critter itself see "in color"? Is it simply a chemical change in the skin? Can it change color in response to fear? How does it do it? How rapidly can it change color? I've read somewhere that when a chameleon was put on a piece of wallpaper, it changed its skin color to that of the wallpaper!
4 AnswersZoology2 decades agoWhat causes the tingling sensation in a limb, when it has "fallen asleep"?
In other words, I know that it is a result of a temporary cutoff of flow of circulation to the hand or foot, but why does blood flow affect the nervous system in the area?
7 AnswersBiology2 decades agoHow does a spider "figure out" on what plane to construct the web?
Most webs lie in a vertical plane, or slightly diagonal in relation to the ground underneath it. Why not horizontal? Is the spider capable of detecting gravity? Wind currents?
4 AnswersZoology2 decades ago