Build Definition and 462 Threads

Alright for my physics class we need to do a mousetrap car... A car that is only powered by the force given out by the spring on a victor mousetrap... You can't use rubber bands or anything like that... Does anyone have any ideas? The idea of having an arm attached to the spring and pulling...

Does anyone know how to build a device to detect subatomic particles (electrons, muons, neutrinos,, and the like...?) Please, if you do, send me some instructions. Thanks.

[?] I'm thinking of building a simple cloud chamber in order to detect small particles such as muons, neutrinos, and the like. I have read some handbooks but I would be grateful if someone could lend me a hand by providing some instructions. I only have three months to prepare this so I need the...

I was thinking about making a cell phone on my own, but I don't know where I can find sufficient information and the requied knowledge to start. Can anyone please give me any useful advices and information? All helps are appreciated.

i'm really into electronic but right now i have a limited knowledge of electronic circuit. Is there a place that has basic electronic projects that I can built and learn at the same time? I like the projects at http://www.aaroncake.net/circuits/index.asp but they're too advance for me. Do u...

I really need help! I along with 4 other people have to build a car out of ONLY wood and wood glue. The car must be powered by a person sitting in the "cab" of the car. It must travel 30 meters. For every extra person we fit in the car we earn more points. The only rule is that we can only use...

would it be to expensive to build a laser capable of cuting intricate designs out of thin metal or wood about 0.5mm? for a hobby project.

Hey guys, I am new here. A firend and I have decided to build our own rocket. adn we were wondering if any of you knew what the brun temp. in celsius was for a model rocket engin. We are looking at the G2's. any help would be great here. thanks a lot!

Here's an interresting poll for you all. The government has decided to build a power plant nextdoor. You have no way to convince them to put it elsewhere (just assume you drew the short straw). You also don't have the means to move away for at least 10 years. They do give you the choice...

"It's the smallest synthetic motor that's ever been made," said Alex Zettl, professor of physics at UC Berkeley and faculty scientist at Lawrence Berkeley National Laboratory. "Nature is still a little bit ahead of us - there are biological motors that are equal or slightly smaller in size - but...

What would you build, if you were given godly powers and could defy the laws of everything! Id build a device which fitted on my wrist, could telport me anywhere through time and through space and could get any file off the internet within 5 seconds, no matter hwat sixze it is, and store it...

I have wanted to build one quite a few times and one ofmy friends showed me a good website and it is a $50.00 one if you buy used components and it looks pretty good but we would have to set up our own propelling system because it moves pretty slow can't remember the exact speed... So all in all...