Build Definition and 466 Threads

Hi, I am trying to build a 3 amp-min circuit and measure the magnetic field generated along the wire, but having problems figuring out how to build a stable circuit. I have a: DC power supply (150V 3amp), insulated copper wire rehostat (Which I think I have a wrong...

I am a double major in EE and physics and I was thinking that a great senior project would be to design and build my own mass spectrometer. I would not only like to build the basic device, but also calibrate the device so that it provides the m/q value based on the radius of curvature caused by...

I'd like to build my own current sensor. There's this site that I've seen h**p://www.coilgun.eclipse.co.uk/current_sensor_module.html and there is this equation that i don't understand.. kindly help.. I actually want to sense current from running electrical appliances, (i.e. tv,electric...

I always think of little things I want to build or do. I originally studied EE when i first got into college, but switched to IS. I have a base understanding and can solder. I'm basically looking to build a device that hooks inline with a sensor on my motorcycle. The plug has 3 wires (power...

I have some questions about mesons. I don't really understand why they are build up from a quark-antiquark pair. I know from the theory that one can classify the mesons by considering the tensor product of the fundamental representation [3] and the representation [3'] (the prime for denoting...

why are guns metal? why are bridges made the way they are? why do we not make double decker lorries? this is my thinking... you follow?

Any ideas for a good Rube Goldberg Machine anyone?

We have an LQG group in NUS (National University of Singapore). Here's our website: http://sps.nus.edu.sg/~wongjian/lqg.html Please contribute any material suitable for fresh graduates!

Hi there :) Can someone please help me with any tutorials/pdf docs/websites/formula on how to build an inductor? I need to create an inductor of 1.35mH ... but I would like it to have a reasonably large area... maybe a coil with a diameter of 20cm? And if there's any formulae or program...

hey guys, i need your help! how can i design and build a machine that lifts and transports a load?

http://www.hiddenpassageway.com/ This really cool!:cool: Does anyone know if it's possible to build rooms like this without having to spend $10 thoundsand

A home can be any thing from a one roomed tent to a palace, but when did people decide to build upwards and why? i can understand todays land prices drive buildings upward but was that the original consideration?

Is it the case that every country in the world--including places like North Korea, Iran and Syria--ought to have the right to build nuclear power plants? (That is, the question is not whether such countries currently have a legal right under international law.) A. Yes B. No

Hello. I was just wondering. What if you build a big vacuum sphere (of glas?) about 1-3 m in diameter and took a BIG parabol to focus the sun in the middle of the sphere. How big must you make it to be able to reach the temperature for fusion? :biggrin: If the diameter is to hugh...

I am hoping that you will help me to build an E.M.P.. Is there anyone that knows of plans or where to get plans for this device. thankyou

Help Quick! ok so i made a cheap thermometer this the manual to make the thermometer 1. Tap water 2. Rubbing alcohol (do not drink this) 3. Clear, narrow-necked plastic bottle (11-ounce water bottles work well) 4. Food coloring 5. Clear plastic drinking straw 6. Modeling...

I am working on a project of maglev train and want to build its physical model(as simple as it works) just to give an idea that this project is in working condition and also some mathematical modeling that will help me in my research paper So please if anyone can help me in this project I will...

well I am building my car, now the paper recommends that you use paper clips that are like unfolded. After then you put the paper clip inside a rolled up piece of paper. but i can never seem to get the paper clip like exactly straight. The paper clip is the axle. So when ever the car moves the...

Hello, I have taken on the task to build a pulse-jet for my final year project and could do with help designing an outside test cell to measure thrust. I am considering attaching the jet to the test cell using a strain gauge pin. What do you think??

Hello everyone, I almost got all the parts to this problem: In an RC series circuit, = 11.0 V, R = 1.10 M, and C = 1.80 µF. (a) Calculate the time constant. 1.98 s (b) Find the maximum charge that will appear on the capacitor during charging. 19.8 µC (c) How long does it...

How much are graphite plates? I need them to build my fuel cell.

1]if it takes 10 men to build 120 houses in 60 hrs,how long will it take 5 men to build 60 houses 2]if it takes martha 2 days to do a job and tina 3 days to do the same job,how long will it take both of them. i need help not just for these questions but all.so i need a general explanation...

Need a help on how to go about building a Laboratory scale using strain gages I need to build a scale with a working range of 2 to 200 gm, an accuracy of at least 2 gm, footprint of no more that 16 in sq, and use no more that 6 strain gages. I believe I need to set up the strain gages in...

Strengthen America - build a church! :) I have an old book on civilization aptly titled Civilization by Kenneth Clark. He suggests that the key to a successful civilization is confidence - confidence in a bright future for the society, a sense of energy, vigor, vitality, and permanence. It's...

Guys I am having trouble making a physics toy. I don't have an any idea what to do please help me any suggestion, examples and websites will do... Please. I need this to graduate.. Thanks for the help guys

Is it possible to make microorganism create nano-objects or nano-machines? Any known experiment? Regards!

If i build a computer purly for folding, what are my best options. I do not want to spend a fortune, but i want a system that will make a reasonable contribution.

Almost seems as if this is an alien designed aircraft.. I know.. I know.. I couldn't help but get amazed at this http://www.military.cz/usa/air/in_service/aircraft/b2_spirit/b2_spirit-1024.jpg :rolleyes:

What kinds of engineers usually build submarine?

HELP me PLease I have my final in my class tomorow and I am freaking out. it is an Egg Drop lad. we are droping it from 10m high and we can only use 200g (includes Egg)im not very good at physics and i have to get a good grade can someone give me an idea on what to make for my package? i can't...

On another forum we made a funny little joke about what nations would do if they tried to build the deathstar in relation to how their country normally does things. If they tried to build the deathstar... I said if the US tried, it would probably not finish it and it wouldn't work if they...

I need to build an electromagnet. I have 2500 feet of 19 gauge magnet wire, and an iron core available. I'm not sure how to get a power supply that would supply enough amps to make the magnet strong enough... Anyone have any suggestions? Caleb

I am looking for sound generator from 300 Hz frequency up to 1.5 KHz, with adjustable volume. Is there such a thing in the electronic market? I also want to know the frequency it produces as I turn the knob. If I want to make the circuit myself, where do I get the circuit plan?

Hey there! I need to make a battery powered dragster for my physics class! Here are so requirements... Only AA batteries, but any number is allowed. Only commercial motor and gears are permitted. Everything else on the car must be materials not meant for their use (ex. car wheels must not...

The problem is as follows: Design and build a program that does the following: a. Declare a 100-element array that will hold float values. b. In a subprogram set each element of the array to a random float value from 1 to 10; i. Use the rand () function and the stdlib.h include file; c...

I'm not sure anyone here knows, but let me explain what a PSP is. A PSP stands for "Playstation portable" its a home entertainment system which you can do the following: 1) Look at photos 2) Download music, listen to music 3) Download videos, listen to video 4) Play full 3D video games...

http://www.forbes.com/home/feeds/afx/2005/05/02/afx1991335.html According to the above link, ITER "is not expected to be operational before 2050". Is this true? I had thought the time that would be required to build it would be less than twenty years even from a pessmistic viewpoint. If it...

i need to build a filter that will accept a 200hz square wave that will remove all harmonics other than the fundamental. there also needs to be an option to pass or block the dc value in the circuit. i understand the how to make the filter, but not the part about how i would have an option with...

In my car the OEM amplifier runs dual-voice coil subs. Its a SMT PCB with all ICs on even the outputs, no SMPS so its just 12V for the rails and the outputs are already bridged. Easy to see why many junk it and use an aftermarket amplifier come upgrade time. But I want to try to use it as is...

Hi there, I need to build a Maglev= (Magnetic levitation) train for a science project. I already build a track with coils and permanent magnets, but unfortunately my teacher doesn't know which computer program is suitable to switch the current whenever it's needed along with the north and...

So, my current computer was bought in Summer 2001. It's got Windows ME, 1.5ghz P4 (not that bad), and 128mb of some weird type of Ram. Needless to say it's not all that good. So, I'm in the market for a new computer, and was wondering if any of you oh-so-smart people knew of any websites that...

:confused: I am in 11th grade Honors Physics and we have to build a full size chair out of newpaper and masking tape...the only advice given by our teacher was to think about bridges...and I am lost on this one..can anyone give me some advice?? All help is greatly appreciated! thanks

Can anyone help me attempt such a project? I basically need to be able to sense the injection pulse in the injector pipe (1/4 inch / 6mm dia.) and convert it to an electrical pulse so that a normal ignition timing light (strobe light) can read the input as it would on a petrol/spark ignition...

I am curious about microscopes, I know i could buy an optical one for around $200 $500, i am wondering about how hard it would be to build a microscope that sees at the atomic level? I imagine buing one is pricey. Is it within the budget and access of Average Joe to build a microscope that powerful?

how do you build & design a bridge with these materials? 4 drinking straws 10 pieces dressmaker's oin 5 pieces of 5-peso coins (the bridge should be able to withstand the weight of these coins) 1 short bond paper and a 1 meter sticky tape Anyone who has performed this project...

has anyone here ever built a crystal radio? what parts would i need and where can i get them? in the physics forum they said one could be constructed to run off the radio waves themselves, which is the kind i would like to build. thanks

Homework--- Build Atomic Bomb What is the general output of enriched uranium from an electrolysis and fractional distillation process? I have already researched the outputs for gas diffusion, thermal diffusion, gas cenrifuge, laster isotope separation, and mass spectroscopy. If you could give...

Anyone have some ideas about how to build a scale model of a trebuchet?

hi i am going to build a pc from scratch, i have chosen a Asus a7n8x motherboard and an anthon xp2500 processor, but I am stuck choosing memory, can anyone tell me what memory will work best with this combo?

Ok, so how does DNA build things? Say, even something as simple as a virus. The virus inserts its DNA or RNA or whatever, and it's coded into proteins. So how does the protein make a shape? Like in that T4 virus that looks like the lunar lander thing, how do the proteins assemble into the...