Checking Theories

In this topic, place your theories of some chemistry experiments in the comments section, starting with this one. To start with, Fe + 2H2O --> FeO2 + 2H...Place iron fillings to fill 1/3 of a water bottle. Fill the rest with water, and place a balloon on top. Wait X days/weeks/months. The water reacts with the iron to extract the oxygen from the water, leaving only hydrogen, and rust in the products. In the reactants, the hydrogen was bonded to the oxygen.Will someone tell me if this works? The energy that bonds this is the potential energy in the water.

Topic by PKTraceur   |  last reply


RELATIVITY THEORY? Answered

Which things I need to know to study relativity theory? And any good book to study it?

Question by Ahtasham Ahmad Mohtashim   |  last reply


My theory...

So here is my theory. If you did all the math, (which I did),  and made a syrup of the exact viscosity. Would that syrup flow like water underwater just like water flows in air. Here is a diagram with all the math there for you.   I created a simple ratio... the number at the bottom right is my perfect syrup viscosity.

Topic by vroom...vroom...   |  last reply


My "theory"!!!!!!!!!!!

"The world was created in 7 days" Is one "day" for us, one day for God? 1 day for God could be 1 billion years or something.

Topic by assasin   |  last reply


Scientific Theory

I am working on a scientific theory and I need a little help. I have 2 car batteries in series to create 24v need to power an electric motor. The motor is 14.5 amps and I need a way to control the amperage from the car batteries to the motor. Any help would be greatly appreciated.

Topic by Ice Dragon   |  last reply


Another theory...

I was wondering if this is doable, or even practical for that matter. So I read up on lasers and from what I can tell it is a form of light in which the wave frequencies are perfectly aligned. So I was wondering if you aligned UV light wave frequencies, would you get a laser that would burn stuff, and not to sound morbid, but in high quantaties, kill people. (Only for the sheer exitement of figuring something out am I posting this. I do not in any way want to kill someone.)

Topic by vroom...vroom...   |  last reply



Unified field theory?

I was windering if someone could tell me how to add gravity to the Unified field theory? thanks

Question by RelyNupon   |  last reply


theory of water rocket?

Question by ainmiey   |  last reply


"Growing Earth" theory ...

Hi.I was wasting some time on Google Video, and I found this one.This man believe Earth (and others planets) are expanding ...According to Wikipedia, this theory is not new, and is serious. After all, if the Sun (and stars) grows, why not the "core" of planets too ?

Topic by chooseausername   |  last reply


Music Theory 101

Hello, i got an idea of making a series of detailed, yet easy to understand instructables on music theory. i mean music theory, and i mean things you would learn in college level class. i preety much dedicated most of my life to music theory, piano, cello, and listening, as well as analyzing written music. i have also had great teachers that thought me a lot of things about music and life, and i would only feel like the greatest asshole alive if i didnt share them. one thing that is special to music theory, and only to music theory, is that it is a field of study that originated from art, not vice versa. those instructibles would cover preety much everything involved with music, including the mathematics and physics that go with it! history will be included too! the reason why i'm posting it here, is to see how many people are interested, who would want to help out, and to look for reccomendations and requests. my resume: 5 years piano 4 years cello 9 years music theory perfect pitch played in 4 different orchestras considering starting doing a chamber music program, orchestras are getting boring now :D im part of the Tri-M music honor society and i volunteer sometimes. PLEASE REPLY WITH WHAT YOU THINK ABOUT THIS PROJECT :D music theory

Topic by macplo 


Solar oven theory

When looking at various solar oven on instructables, they almost all use refective coating of some sort on the inside. That to me makes sense for the concentrators/parabolic/funnel ovens, etc. I am just wondering if the regular box ovens if it really makes as much difference or if the heating factor there is more so just the still air in the box being heated and not able to escape. I want to start making solar ovens to get an idea of how they work. I have a square piece of 1/4 inch glass, probably 4 ft by 3 ft. I thought about just digging a cubic hole in the ground and laying the glass over top.

Topic by avocadostains   |  last reply


4 Reasons why we believe in Conspiracy theories

Did NASA really land on the moon?Did the government cover-up involvement in the Sept. 11, 2001 terrorist attacks?Is Elvis still alive and kicking? What about Michael Jackson?Was John F. Kennedy assassinated at the hands of multiple shooters?Do the Freemasons control the United States?A small but fervent group of people believe there was more than included in historical record about the aforementioned events. Conspiracies, they call them. And every generation has its own.Some of them turn about to be true, after all: Pearl Harbor was a Japanese conspiracy and Nixon’s Watergate break-in was a coverup.But with so few that turn out to be true, why do people believe in conspiracies?HERE is the link to the Rest of the story.And one final note:so, NOW we know who was on the grassy knoll and shot JFK LOL It was JFK himself !!!

Topic by Goodhart   |  last reply


Big Bang "theory" Dbunked!

Http://www.youtube.com/watch?v=B-U2uI1f8mU

Topic by slasinski   |  last reply


What is the definition of "matter" according to the string theory? Answered

Hello!  I have recently studied about the string theory. Now what I have understood about it so far is that very small particles like the one's that make up neutrons and protons are actually made up of "strings" that vibrate in 10 dimensions at particular frequencies which determine the nature of the particles that they form. I also came to know that "strings" themselves are weird distortions of space-time.   Now I don't know if all that information is correct or not. So my question is that according to it, it would mean that matter itself is a distortion of space-time, is this true?

Question by Wisaam   |  last reply


Magnetmotor - really impossible or just supressed?

When someone starts talking about a so called magnetmotor than most people judge right away.Laws of physics, perpetuum mobile is impossible, magnets are static....We all know the limitations nature puts on us... That however did not stop quite a few people since the 1950's to build working magnet motors. Or, to be precise: To make the claim, show them and then somehow disappear. A few though seem to have survived and even claim to make good business. Securely closed machine, stellite tracking and 24/7 online monitoring. Either just a bad and long running hoax or a real attempt to keep a secret secret. Even the somewhat famous Yildiz motor showed off around the world only to disappear.Some like them, some don't. Either way all this sounds like the perfect conspirary theory LOL So lets take a look on what is fake and what might be real but missing some vital clues. You can find several good Youtube channels created by people trying to build a working magnet motor. Some of them have no problems to admit failure and still keep trying and updating their projects. Did long enough and you see two outcomes. The first is giving up or "realising" that it will never work. The second often seems like a user is getting some relly good results and is really close to keep the magnetmotor running. Both disappear without and updates or traces. Now of course this is just confirmation that it will never work, but then again: What if it did already quite a few times? Even Tesla had patents for a magnetmotor and so far none of his patents were a hoax. Although none of his patents allow to actually build a working devices without some additional info and knowledge. And that is the key that I am trying to get: The lost knowledge.How can a magnetmotor never work? That one is quite simple from the start. If a linear model won't work no matter where you start then a rotary version will fail as well. And if a linear version works, it has to do so far at least 5 segments and with preferably increasing or at least constant speed. Having said that and assuming you know a little bit about magnetism: Ever wondered about shapes of magnets?? The common types are block, round like a bar and those disk like ones, some even with holes. A less well known version is the ring magnet. You can look them up as well as their corresponding magnetic field geometry - or what is assumed to be the right geometry. To give you a clue: All those floating spinning toys use a ring magnet in the base and onother one in the spinner. In the center is a dead zone for the magnetic field that is far lower than further out on the ring. And the strnger outer fields also reach further - giving the entire spinner a bowl like area to float on, the spinning just stabilises it like a gyroscope. A similar flat disk magnet wouldn't have this indentation in the field but rather a dome like sphere. The ring just kicks a dint into this sphere if you don't mind the simpification. Similar changes in the field structure happen when you combine two or more magnets. One example we all know is stacking identical smaller magnets. And often we are suprised how much stronger two thin disk magnets are compared to a single. Distance however sets a certain limit. And take those hook magnets... Just a small ring magnet in a metal pot with core. Remove the magnet and just by itself it is far weaker. Why? Quite simple.... The same way a transformer core directs the magnetic flow, the metal part of the hook magnet provides a shortcut for the magnetic field - and in return all is much stronger ;) Now you have some more clues, but still there are tons of options for failure... The most common is the sticking effect. No matter how well you planned and designed in most cases you linear or rotary prototype will stall sooner or later. Even if started manually at high speeds some seem to run very long but once they slow down and stop it is obvious they always stop where the magnetic field won't allow the binding effect to be overcome.Wouldn't dare to say that I have a working magnetmotor, but I might have some clues you want to try if you decide to give it a try yourself. So how COULD a magnetmotor actually work? Like in the Perendiv examples all over the web, you could aloow a moving responder to the rotor. Like a piston the responder will be lifted in areas it would otherwise limit or reduce the speed of the system. Well designed only a few mm would b required but it also means wasted energy to move the responder. Then there is the nice way of modifying fields by adding magnets in different angles and polarities. Lets say towards the end of your stages on the linear model it is hard to overcome the binding effect from the end of the previous stage. The perendiv model would now somehow change the distances. But you can also add magnets to lower the binding effect ;) Like a ring or hook magnet you can shape the field and offer a stronger repulsin field or a lower binding force. Last but certainly not least is the option of adding magnetic metals like iron or somehow weirder ones like bismuth. So, do we have any examples of something very common utilising any of this? We sure do :) Take a speaker apart and you end with the cage, the membrane, the actual work coil and the magnet. We don't need anything but the magnet so take a good and very close look. What in the audio world is called a shield to prevent the magnet from messing with things close by is exactly the same as on a hook magnet ;) Only difference is the tiny gap for the coil. The magnetic field is directed into two paths, one by the metal core, the other by the inner enclosure of the magnet or the magnet itself. The coil operates in the area of maximum flux.Last hints... If you take two identical and strong magnets with north or south facing up then it is quite hard to push them very close together. But check what happens if you try the same wen both soth poles (or both north poles) are placed on a magnetic surface - if in doubt your standard fridge door. Suddenly you can move much closer together with the same amout of force (not considering the added friction!). And similar story for opposing configurations. Where in free air or on a table the magnets would just jump together, on a metal plated you can move them much, much closer before this happens. Copper pipe and magnet fun :) Ideally you would have a straight copper pipe and a cylindrical magnet that has a loose fit in the pipe. Aluminium pipe work too or even a roll of aluminium foil if you have nothing else. A magnet in the pipe will travel very slow down the pipe, friction is not an issue here. So what is slowing it down? The magnet creates a field in the pipe and through that the pipe generates electicity. And funny enough this electricity creates an opposing magnetic field in the pipe - the magnet slows down. Even if you glue it onto a wooden stick it won't rush through it. Trying to push it by hand and you feel the created resistance. The faster you push, the harder it is to push! If you made it all the way down here with the reading then I have to assume you fit into one of three of my categories. a) You are a total sceptic and just read it for your amusement. If so, then please don't post a reply with usual negative feedback, instead see it as the same fun you had reading it ;) b) You are at least curious and like to play with magnets. In this case take the above as inspiration to explore more ways to have fun with your magnets! c) You are more or less frustated because you wasted a lot of time and some money to build a magnet motor that just won't work. A and B might go on and enjoy the fun, C however might want to read very attentive now ;) If you take some indicator sheet for magnetic fields, like these funny green ones, and play with moving magnets then you see a very interesting effect on the "screen". The otherwise static field lines change chape and sometimes even seem to disappear or shrink. With a small rotor assembly it almost looks like flashes when the magnets move past each other. This effect is often totally neglected and to be honest I overlooked it for a long time as well. Being able to see how the magnetic field changes gives the thing an whole new dimension so to speak. Creating a magnet with a complex shape is difficult to say the least. Only ferrite or ceramic ones can be used and you would cut of machine them according to your desired shape and with regards to the orginal center of the magnetic field. So most people revert to the classic way of shaping by adding magnets of various types, sizes and amounts. Modern neodymium magnets make this trial and error process easier as there are many sizes and strengths available. Add a detector shield of suitable size and you have hours of fun time ahead of you. But doing so in any rotary assembly is next to impossible. So what did Yildiz differently and what was missed so many times? Yildiz took it a step further and not only provided "shunts" to create very strong magnetic field from the generated electricity but also a second rotor. Since we all start small lets focus on the basics first. Remember the hook magnet and speaker or the copper pipe? Some examples for shape shifting your otherwise static magnetic fields: 1. A magnetic metal "connection" from one (low in the armature) pole to an opposing (high in the amature) pole with cause the field from the "high" pole to "bend" towards the connected magnet. 2. A magnet with an orientation of 90° to the last magnet is the sequence will severely influence the field of this last magnet! This goes for either orientations! 3. Adding a non-magnetic "shield" around a magnet, like a piece of copper pipe, will not affect the static field of the magnet. However it will severely alter the field of the enclosed magnet when another magnet passes it! It will also affect the overal field during the passing as the moving magnet will also induce a field in the copper by affecting the field of the enclosed magnet! Thickness and lenght of the shield influence the strength of these effects. 4. In a simple perendiv motor design the bar that creates the attraction for the spinning part is a magnet too. Either a long bar type or two small ones with an iron or nickel rod between them. There is no need for a piston or something that drives the bar up or out of the way ;) Just use the right magnet at the right spot on your rotor to repell the bar ;) Mount the ar with suitable springs and you suddenly can have multiple stages on your rotor instead of just the usual one! Don't forget the moving magnet on the opposing side of the segment in question though as otherwise you still will get stuck. (Hint: You can place a small but powerful magnet in the center of the opposing bar ;) Just make sure you limit the springs movement so the bar won't be pulled closer)Ok, hold on now! Does a magnet motor actually work or not? I can only give hints and say the laws of physics as we know them apply to magnetmotors the same way as everything else. Unlimeted motion without supplying energy is not possible. Limited motion with adding or using energy however is still possible and real. The same is true for being able to machine, 3D print or otherwise manufacture at very tight tolerence and accuracy levels. This includes bearings or bearing systems with very little friction losses. Just check these floting and rotating magnet toys that look like a spindle. Only a tiny needle like pin makes contact with a glass surface - next to no friction loss. A proper and supposedly working magnet motor should provide more energy than what it uses - one way or the other. No law of physics lets us get around the fact that such a motor could only keep spinning if the produced power or motion energy is at least the same as what is required to make it move. Magnets lose their strenght over time, they are like a very slowly depleting battery. So, isn't it funny that all magnet motors so far that claimed to work also had the requirement to replace the magnets once the things fails to work or start? And if you leave a very strong neodymium magnet shielded from outside fields or magnetic stuff than your grandkids will still find a quite strong magnet. Do a little performance test with your new magnets, like how much force is required is required to lift them off a steel plate. Make the same test with the magnets once you played around extensively with them in your motor. Now take a spare magnet that was never used from the orginal batch and compare both against each other ;) If the motor would not use energy then why are the magnets depleted to a certain degree, realted to runtime and usage time? Wait a minute! Does that now mean it actually works? Lets just say energy is certainly used. We only know similar effects from electromagnetic systems. But did anyone ever really check how much actual energy is in magnetic field generated by a non electric magnet? Get a good sized N52 neodymium magnet and check how much force is required to pull it off a steel surface. Now try to get the smallest sized electromagnet capable of that force and check how much energy it consumes at the level that equals the pulling force of the N52 magnet ;) Makes no sense to even try to compare these you will say now. I just say energy is energy and we were formed to only think in certain ways and don't even try silly things like this ;) To keep the fun up let us imagine we would actually have a similar energy available than what our electro magnet would require. In reality more because we wouldn't have electrical or flux related losses in the metal around the coil. Or is the imagined reality, no clue ;) If true it would mean even a motor with very bad efficiency would be able to create huge amounts of torque. Well, torque is basically acceleration. Which would mean our motor would not just be happy to spin, it would speed up until the bearing fail or the thing is ripped apart. Imagine a dental drill of that size and weight suddenly falling apart at full speed... Every example of motors claimed to be working, that are not fakes, seem to be happy no matter what the load is. It the thing turns a generator than it would have to slow down a bit with the increased load but they don't. With no limited factors otherwise this makes them a fake. Even a perfect motor would have to react to load changes.... Don't we agree that the stronger the magnetic force or field in a conductor the stronger the resulting magnetic and opposing field of the conductor? We use the difference to either drive a motor or take out electricity... But if you take the "open" shielding of a magnet in a changing field than the influence of the shield on the overall field gets stronger with stronger field changes. And properly desinged and orientated they would actually double as a natural limiter for the rotation speed. Once the electrical energy in the shield becomes too strong it will be able to cancel out the field of the enclosed magnet...If we assume a magnet motor is really possible and works with the intended output to keep it spinning or even take energy out: Then what would be possible downfalls that stop this thing happening in everyones garage? We can explore the stars but so far no one bothered to invent anything to visualise magnetic field in a 3 dimensional way other than by simulation. No realtime and true observation like this. The few working technologies that exist rely on sensors, interpretaion and filling in gaps. But imagine something like a detector shield as cloud! And then even better with selctive spacing to get a realtime view of where exactly the field lines go. All we can do is forget our teaching and try it out anyway ;) If by some mistake a magnet motor would really work right away, then chances are high the inventor would wonder why that thing takes off like mad and how to stop it. Unless well prepared it would certainly end in the destrution of the motor. But the inventor would know what to look for in the next prototype. The logical conclusion would be to the couple the energy taken to the speed while physically limittin the free load speed. The other one would be the design the electrical generator around the and within the motor. To even get close to this point you would have to spend endless days and nights working on finding a solution. The closer you get the more disappointment when the final model still fails to keep spinning for more than a few hours. Most people will then accept defeat and move on... Still not saying it actually works but if you made it to this point in time where it could be easier to move on and do other things:Ever wondered what would happen if you "shield" a magnet with a coil? Of course nothing would happen as we know. But try this in some fixed assembly that allows you move another magnet through the field of the shielded one. Perferably witha force gauge or some option to read out the energy required to move it through the various stages of the field. See what happens if you short the coil or add a resistor to it ;) Now if this coild is able to produce electricity then the more we use the more the effects on the required force would change. What do you think would happen if you combine common coil relations of electric motors to a "coil shielded" magnet motor? Right, all these coils would interact with the magnetic fields of the coils they are connected to... And through that with the overall field surrounding the enclosed magnet..... I leave up to you to imagine how these interacting coils could provide "resistance" or "acceleration"/"surplus electricity"...Like they say: You can only find out if you try ;) To keep up the positive thinking: A permanent magnet just sticks to any magnetic surface and does so with the same force. But the real energy loss in terms of getting weaker can almost be neglected. Any electromagnet capable of the same holding force woul require ongoing energy supplies to keep it up. It is using energy the same way the permanent magnet does! The difference is the permanent magnet is not seen as anything that would provide us with energy.... And if it can't provide energy other than passing through coils then why the heck does it keep sticking to the fridge year after year? It does require energy to keep this weight up doesn't it, even if you add a thin teflon disk and oil to reduce friction? ;) No magic, no "free energy" bogus, just plain physics viewed from a slightly different angle than what we learn in school ;) Have a good laugh and a good beer, then read it again and just consider some of the things here that are not mentioned in any literature about magnetism that we commonly use. Now I got you thinking, didn't I ? ;)

Topic by Downunder35m   |  last reply


assassins creed hidden blade theory

Can someone please send me designs for the assassins creed hidden blade i want a real design not a paper cutout or a link to a real design

Topic by mr.militarymaster   |  last reply


"Kiteman" proves theory of Reverse Evolution!!!!!

Http://www.dailymail.co.uk/news/article-1210029/Humiliation-science-teachers-Funky-Chicken-dance-class-highlights-YouTube-threat.htmlOk, my mistake. With the headlines, and the (initially) grainy photos, I thought this was Kiteman- Demonstrating the FACT that intelligent beings can "de-volve" into funky chickens.

Topic by skunkbait   |  last reply


New Theory For A Pump Action Gun

The black is the gun body, the red is the ramrod, the yellow is the pump, the green are the wheels, the blue could be either string or fishing line. Theoreticly i think that this gun can hold as much power as you can pump if you use high quality fishing line and you have built a strong gun body. I think that this could be a very powerful shotgun if built right. i myself have tried to do this many times through but have never sucseded. I would like to see someone give a shot at this one. I looked around extinsivly and could find no gun like this. I give a thousand congrates to whoever sucsedes in building this. Also if someone does happen to build it I would like partial credit and instructions. I would like to thank all of you for taking you time to read this through.

Topic by TheAwesomestDude   |  last reply


My Theory for How Gravity Works

So I've never really found out how gravity actually works, why it happens. But a few days ago I had a epiphany. I don't know if I spelled that right. So everything is at least a little bit magnetic, even stuff like wood, no matter how little. So all of this stuff would be attracted to all the other stuff electromagnetically, right? Even a little bit? So when you get huge amounts of this stuff (I'm thinking planets here) there is enough electromagnetic attraction to pull it together, and voila! We have gravity! Plus when you have planets, there's tons of stuff like iron and other metals and metaloids, that could be very strong, magnetically. So if I'm wrong (which I probably am), can someone explain how gravity actually works to me? I'm constantly thinking about stuff like this, I get theories like this every once in a while, many of them right. But not this complicated, more stuff like figuring out how air pressure and vacuums work, but basic principle stuff.

Topic by Aeshir   |  last reply


will this theory work for an assassins creed hidden blade? Answered

i built this theory but i did not try will it work? note : the circles are springs , strong ones note : the back end's reach = the long of the blade gets out + the tall of half your arm

Question by top.boy   |  last reply


Is there really a theory behind the hojo motor scam? Answered

I ran into it on line.  More truthfully, it ran into me.  I've never heard of it.  I do know it's a scam, you can't spend $100.00 at the hardware store and build a device that supplies 120 volts at 2oo amps to power a house.  The whole thing did pique my curiosity, just like a gasifier or hovercraft or flying lawnmower would.  The problem is that if you try to find just information on what the thing is all you get is page after page after page of scam sites or people trying to sell plans for some mythical device. The only thing I've been able to ferret out is that it's some kind of perpetual motion device that will power my whole neighborhood if I spend 9 hours building it.  I like to think none of my fellow humans are silly enough to believe that. Anyway, without trying to tell me you have one powering your house and an orphanage out of kindness or trying to sell me plans please explain the theory behind it.  Sorry if I sound grumpy, I've been battling scam sites trying to look legitimate for the last hour.

Question by AngryGuy70   |  last reply


String Theory,..this is not detailed, but what do you think?

Here is a short video (not embeddable, sorry) on the Higgs-Boson and string theory by Dr. Michio Kaku.  Comments?

Topic by Goodhart   |  last reply


Which is more likely to work and which is more based on fact, the modified alcubeirre warp theory or the hiem hyperdrive Answered

Which is more likely to work, the alcubierre drive which allows for superluminal travel using a Jupiter's mass of energy or the superconducting gravito-photon effect that powers the theoretical hiem theory hyperdrive?

Question by amelius   |  last reply


need help with ir object detecor (reflect theory)?

Hi i'm working on a small project using iri want to make an object detector for detecting people who stand in front of a door i don't want to use laser or ir beam cut theory i want to use reflecting theory so that the sender and reciver be in the same side just as supermarkets doors i have searched for many circuits but they all use cut theory this site is my local store that have parts in my country http://www.ram.com.eg

Question by aessam1   |  last reply


Basic DC (direct current) theory and practice for newbies

Hey everyone, as you may have guessed - i'm a newbie to DC theory! Backstory: after graduating i said 'forget it' to a proper job and moved to Australia to travel. i bought a converted camper van that has an auxillary battery for (whatever), and it looks like it runs off 12 volt dc! the Question: how does DC power work, for me and all those newbies out there putting along on the other side of the planet! -cheers, adrian www.bigquestionmarks.blogspot.com

Topic by adritek   |  last reply


Why did the duck go up? Any theories?

http://www.youtube.com/watch?v=-x-z3IAD3g8&feature;=related Skip ahead to 4:57. What he refers to as string appears to be an elastic material. He pulls up and it goes up. He pulls down and it goes up. The video is supposed to be about electrostatic toys.

Question by Vorenus   |  last reply


if we had two moons how would that in theory effect earth? Answered

Gravitational differences, water, magnetic poles anything?

Question by ismael01   |  last reply


How does radio really work?

             I'm studying to take the exam for a technician class ham radio license, and have been reading up for it.  However, the book just gives practice, not theory.  For example, it says that radio energy is carried down a coaxial, window, etc. cable between the two conductors, but it doesn't say how this actually happens or works.  I know what radio does, but I'm a little lost when it comes to theory regarding its transmission, being carried in cables, filtering, SWR, etc.  Answers are appreciated.  Thanks!

Question by mad magoo   |  last reply


Theory, execution and actual construction of a 'Bullet-Shot Location' like system Answered

 How could it be done? I have revised a version using only two microphones that once one of the microphones 'hear'  the sound, a timer will start and will stop once the next microphone 'hears' it.  This would essentially enable you to draw a line straight down the middle of the gun. It would also allow for tracking the location in real-time. How could you physically build it for a cheap set-up. I'll upload a couple of diagrams some time.

Question by Lance Mt.   |  last reply


Xylobands

Anyone  got any theories on how the xylobands work? Especially at the £3 a piece mark? www.youtube.com/watch?v=zxYjRx9fJgY

Topic by kelvinmead   |  last reply


Nova's Elegant Universe

Nova's Elegant Universe is a very well made scientific documentary about string theory. If any of you have been interested in The Fabric of the Cosmos by Brian Greene but don't have a chance to sit down and read something. This is for you.String theory is trying to unify our understanding of everything through one equation, if you think that is interesting then: Click here to watch the entire series // More Brian Green at TED here \\

Topic by lamedust   |  last reply


Earth Ground?

           Well, it seems about time to add to my list of electrical theory questions with answers far too broad for one question, so:                          I understand that the Earth can act as a giant capacitor, conductor, etc.  What I don't understand is why.  For instance, why would ac power from the hot wire dissipate into the ground?  (and, for that matter, will power from the neutral wire not do so?  If so, why?)   

Question by mad magoo   |  last reply


Taylor Couette

Does anyone know how to make the Taylor-Couette apparatus (as illustrated here) http://www.youtube.com/watch?v=pKrnM9uNXRw ?

Topic by piimapoika   |  last reply


Is it possible to create a magnetic difference engine using stirling theory? Instead of hot and cold can strong and weak Answered

I just got finished building a stirling engine using plans from instructables author: thecheatscalc published dec 17 2007. The stirling engine is a heat difference engine. Is it possible to create a magnetic difference engine using stirling theory? I was thinking instead of hot and cold north and south or strong and weak..?

Question by bazalaz   |  last reply



Can the human body be used as a battery?

My son and I are working on his science fair project which is to light a light bulb using a piece of copper pipe, a piece of galvanized pipe, and two wires with alligator clips to connect the light bulb.  The theory is that holding the two pipes in ones hands, the  body will create enough current to light the bulb.  We have not had any success yet.  Even wetting our hands had no noticeable affect.  Any ideas?  Is this a plausible theory?

Question by speedway1839   |  last reply


Air Compressor/Vacuum Pump

I have a theory: You have your supply of compressed air. You connect that by hose to one branch of a y-connector. The other branch is connected to a hose that goes into some sort of fluid that you want to move from one vessel to another. The trunk of the y is your exhaust (in theory). So now I give, say, 15 psi out of my air supply and that shoud drag my fluid out of its vessel through the y connector to the destination of my choosing. Would that work?

Topic by flagrantfouler   |  last reply


would this work for a homemade generator?... like getting a dc motor and turning it in reverse ?

Instead of spinning the moro by connecting it to a battery spin it on the spindle that turns? would it work

Question by sharlston   |  last reply


This is what happens when you're too lazy to buy a real webcam:

Not practical at all and in theory this was more expensive than buying a real webcam but it does work:

Topic by DJ Radio   |  last reply


possibility of Wave Change?

This theory states (my own be exact) that a certain wavelength can become an amorphous solid using a certain gas, a friend of mine agreed with me. What is your opinion on this matter?

Topic by crc09   |  last reply


Hydrogen as a fuel?

It's easy to separate hydrogen and oxygen from water. If you mix them together it doesn't become water until it is burnt. In theory you could make a water rocket from gases. But in reality...

Topic by Princess_Mellow   |  last reply


What do I need to know about high voltage? Answered

I'm planning on doing a little bit of high-voltage work ( see my plasma cutter question), and I know most of the theory ( except why HV AC in power lines wants to go to Earth ground--any answers to that are welcome. I have my own theories, but...), but I have really no practical experience at all with high ( 50,000 volts) voltage, i.e. what gauge of wire to use, what gloves to wear, how to ground a metal container, etc. Any advice is welcome. Thanks!

Question by mad magoo   |  last reply


What the Hell is going on Here? Answered

I was looking at lowney's profile and this is what I found. I have no Idea how this happened but I would like to know does anyone have any theories?

Question by Fred the Penguin   |  last reply


In theory, can you hook a turbocharger to the end of another turbo to make the 2nd turbocharger spin at a faster rate?

I need to know if you can hook a turbo to the output of another turbo so produce a faster rate and air flow, not for car so dont worry im not going to blow up my engine. Also wondering a couple other things car parts related while I am at it, how much force does it take to spin an alternator when its "on". i know that when the car is not on it free spins but once it is and does not have belt hooked to it it is hard if not impossible to turn by hand. thanks for the help.

Question by jobergy   |  last reply


Can anyone recommend an online resource for very entry level IC and general electronic design?

I've taken classes that go into theory and the mathematics behind it, but what I'm looking for is how you go about designing for a task.

Question by deathromp   |  last reply


A Few Ideas

Which should I post first? Blood shot effect for a film (completed) Paintball Flamethrower (theory) Paintball grenade (completed) Call of Duty Ray Gun prop Wunderwaffe prop Which would everyone be interested in?

Topic by mg0930mg   |  last reply


What do you think happened at the Dyatlov Pass?

What do you think happened to the Russian hikers at the Dyatlov Pass? I am interested in any theories that you might have regarding this mystery.

Topic by blkhawk   |  last reply


inflatable plane

I would love somebody to build a 2 seater plane that is collapsable using a telescopic carbon fibre frame and wings covered with a balloon type inflatable skin and cockpit using helium as the inflating gas it would in theory be light enoug to be powered by a microlite engine. And after that a helicopter on the same principals.

Topic by will1947   |  last reply


Dog hydrotherapy pool?

Has anyone attempted to make their own hydrotherapy pool for a dog? The vet has one--it's a big boxy thing, portable (in theory), and has water jets to simulate a lap pool/endless pool. I want to try to make one myself...any suggestions?

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