it can't have any eletricity. we just need it to lift bults
124327
It's been forever since I've done it, so I can't give you an actual schematic (try a search engine for that.) I will give you some tips from my science olympiad glory days, however. I assume you're trying to lift the most weight?\n\nMake your sails out of the lightest material possible and with as little re-enforcement as you can get away with it. That way the energy going into turning the sails is minimized and they can rotate faster (and hence do more work.) Depending on size, posterboard or even paper with a balsawood backing usually works well.\n\nDo you know what will be turning the windmill? If it's a fan, try to find one like it and test against that. If you're using natural windpower, this will be harder to do. Only re-enforce the sails enough so they won't get torn apart.\n\nAs far as the string lifting the weights goes, friction is GOOD. You don't want it slipping and costing you energy and time, if time is an element. In all the other elements, friction is BAD. Break out the ssandpaper if necessary.\n\nAll of this is probably common sense, but I hope I did some good. Best of luck.
674782
But...blasting matter in the direction of gravity's pull IS propulsion! :)\n\nYou can't get any "work" without expending energy of some sort.  There's no way to move anything without using some sort of energy.  Perhaps one day that will involve anti-gravity devices, but they'll have to use anti-gravitons in some way to work, which will involve imparting energy to the anti-gravitrons, which will be propulsion (just a different kind).\n\nThe problem with gravity is that it's pretty weak compared to the other fundamental forces.  The weak nuclear force is millions of times stronger that gravity, which means its anti-force is also milltions of times stronger.  Gravity works well for pulling large masses together into planets and stars, but on a small local level it's not that usable...there will probably be better ways to getting about than anti-gravity.
95100
It would take a lot more energy than is generated in one fusion bomb.  Watch the movie 2010: The Year We Make Contact.
198476
No it is not possible at this time and I doubt anyone will ever attempt it for a couple of reasons.  From NASA's webpage you can read the rest by clicking on my sources link\n\n1. Most of the power in lightning is dissipated as thunder and light, which cannot be easily harnessed to generate electric power.\n2. However, even just the electrical current of lightning is considerable -- 20,000 amps on average, the same as 100 steel welders. But the power is on for only a brief fraction of a second, so the total power is actually small, only enough to power a 100-watt light bulb for six months.\n3. The huge surge of electrical current over very brief times makes storing the energy impractical.\n4. Lightning strikes to specific locations are infrequent and inconsistent. This makes scheduling power availability impractical.\n5. Lightning can be very damaging. The collection systems have to be incredibly robust, which would drive up costs. Lightning is also very dangerous, making it tough on the collection system workers.\n6. Lightning would have to be collected over a huge area, making the system impractically expensive.\n\n#3 Its saying that lightning comes with an extreme burst of energy in a very short amount of time.  When it comes to electricity it takes awhile to build up, electricity created by a damn for example is created by the water and the turbines, it builds up slowly and is put into its reserve where ppl then draw from it.  If there was to be a massive spike were the water all of a sudden speed up to even 100mph the turbines would overheat and become useless.  Imagine charging a battery, instead of putting it on a charger and gradually letting it build up you just zapped it with a tazer or something.  Its not going to charge its going to explode.  Therefore it is impractical to store it becuase we have nothing that could take such a massive amount of energy in such a short time
138090
You might want to get some help pulling a windmill up, they can weigh several hundred pounds.\n\nSERiously though, try this website that also has a howto forum \n\nhttp://www.otherpower.com/otherpower_wind.html
629857
We could, but the only ones with the kind of technology needed to accomplish this ARE the aliens.  Asking them for help would kind of defeat the purpose, wouldn't it?
648255
Yes, it could and we will harness this form of power in the future.\nHowever, please remember that lightning is used by nature as a means of providing food for the soil bacteria with nitrites and nitrates. Like anything else, if we become greedy and harness all the energy, we may create environmental problems, such as food production. This is in parallel with harnessing water in a river, and then holding up all the water to generate electricity and not let other creatures that depend on the water flow have that water.
385699
Your first paragraph is quite true. Tesla patented various methods for transmitting power using large resonators with local "receivers."  If you have a resonant cavity you can get pretty good coupling between source and receiver (microwave oven for example).  The general use for power distribution has its problems, not least of which is how do you charge($) the receiver?\n\nThe analogy of sympathetic vibration is valid.\n\nNot sure what to make of the magnetism bit.\n\nElectrons resonate - they may in fact be "resonances"\n\nOur entire electrical power system is based on Electricity and Magnetism so I think the answer is yes we can pick up energy.\n\nWhat may be missing is that we also have to provide the energy up front before we get to pick it up!
386570
Without the math, here goes:\n\nFirst problem is the weight and dimensions of the ball - you need a heavy ball for the gravity portion of your power extraction, however you'll need a light ball (less dense than water) to achieve any power from the buoyancy. That means that if you are going to have any significant buoyancy, you will not have enough weight in the ball to refill the canister and if you have a heavy enough ball to refill the canister, it will not float. This appears to be an unsolvable condition without the addition of another external energy source.\n\nAnd if you could overcome these concerns - how would you get the ball back at the bottom of the canister once you move it over and let it fall?\n\nBe that as it may, using buoyancy and gravity (opposite forces) to produce energy is an interesting idea.
387755
We did something like this in my physics lab with an Atwood machine.  It was a pully with weights hanging from it.  I can't exactly remember how it worked, but maybe this will inspire you.  We also did something with an air track and these two masses colliding and we'd see which one would go in which diretcion.  You need a nearly frictionless surface, like an air hockey table or ice slab.
270520
High voltage electrogravitic levitating aluminumn foil triangle...aka..."Lifter"\n\nEven if you dont do this you gotta see the video clips.  A balsa wood frame and aluminum foil body, hooked to >20k voltage supply makes it levitate.  This has been replicated over 100 times by all kinds of people.
222354
None. It takes no power to maintain that speed (on level ground, no friction). The object has kinetic energy (0.5 * m * v^2). Power was required to put it in motion and power can be recovered by decelerating it. If you do the math, the energy is 3551.86 ft-lb, equivalent to 1 horsepower for 6.458 seconds. Answer 1 neglected the fact that weight must be converted to mass by dividing by g, and energy is proportional to v^2.
152558
If you could find a transition between an inverted state and a ground state of 1 joule, you could probably make a laser of that frequency. At this point, hard gamma rays are the limit we have done.
94568
its electrical properties
561081
There is a little research and some guy even wrote a book claiming that teleportation is feasible.  But don't buy your home teleportation machine yet.  As yet the only thing that has been transported is a few laser beams.
156011
Very low, as most of the funtions are controlled by minute electrical impulses, you dont want to be messing around with anything stronger that a AA battery.
352356
Here's an idea. Make one that will shock people(low voltage) when they ring your bell. ;-)