Engineering

Lots of scientists are racing to find ways to power cars without expensive fuels. Some people suggesting having a car that runs on hydrogen, and then, funneling the water that was created back into the engine. Unfortunately, due to the law of science that says that no system can ever be 100% efficient, that wouldn't work. However, what if cars ran on magnets? Public roads would be replaced with tracks that are made of north pole magnets. The tracks would look like metal T's protruding out of the ground, which would keep the cars (with north pole magnets on the bottom) from simply being lifted up into the air. Tracks, in this case, would have to go into each pe…

Hello you all! Rocket engines often pump liquid propellants in their combustion chamber, and many cycles are used to power the pumps, the best known being: http://en.wikipedia....le_%28rocket%29 http://en.wikipedia....le_%28rocket%29 http://en.wikipedia....le_%28rocket%29 but here I'd like to describe uncommon cycles, which may be new and of my invention. ======================================================================== The first sketched cycle cracks in a pre-chamber a hydrocarbon or an amine with hydrogen, which produces methane (chemists call this hydrogenolysis), some excess hydrogen, and enough heat that the following turbine powers all pumps t…

Hello forums, I'm new to this site, but I was wondering if some of you could shed some light on this problem I have. I'm currently working with HF, but need to create a fume hood to ventilate it from the work area. I've been trying to look up ways in which this can be done, but I've only come up with a lot of health and safety reports. Many sites have lead me to look into such devices as fume scrubbers, picking tanks and other fume hoods, but don't explain how to construct one. The amount of HF I'm working with is maybe a small beaker( <250ml) of this acid, so the apparatus doesn't need to be industrial in scale. If possible, I'm trying to make it will i…

I'm creating a test setup similar to a dyno and am trying to detect the torque from a motor shaft. I am using an Eddy Current (EC) Brake to absorb the torque coupled from an engine. Below is a rough sketch of the test setup. The brake will be centered on a plate that is allowed to rotate on one side and is supported by a load cell on the other. Can you guys help me with the statics of finding T_1 (Torque from the motor) knowing the values of W, L and F_y. Thanks!

I have a set of speakers plugged into an apple AirPlay unit. When the AirPlay device boots up and successfully connects to the network (when the light turns green) there is a "pop" or a noise like your ears popping. Is there a reason for this, or is it a sound effect maybe that apple designed the AirPlay device to produce when it was ready for use?

I have 2 pieces of 4" I.D. PVC. They are about 5'6" long each, and partially cut open to make a 'U' sort of shape. Now, my question is, is there any way to make a curve across the length of the PVC, to make a sort of hemisphere shape?

What do you think about the Freedom Ship? Here is their website address: http://www.freedomsh.../overview.shtml They call it a community that is on a mile long ship which travels slowly around the world and has everything a regular city has such as schools, hospitals, airport, ship ports, residences, vacationers, businesses, and a shopping mall. This is in the making now. They have well thought out plans and even offer the prices to purchase or share residences. I copied and pasted the following for more information, "click on the URL site below to view the Freedom Ship Discovery Channel video clip. http://video.google.com/videoplay?docid=8962310630082930010 ".…

I have Worked out the force needed to punch one hole in 6061 aluminum 3mm thick. Now I need to know what force is required to punch 11 holes spaced 300mm apart in a single length of the same product at once with a single rail holding the 11 hole punches?? I am not a student it is not homework!! I'm sure that over distance and the number of holes, would increase the force required, but by how much I am unsure. The hole punch required is a 4.7 ton hydraulic hole punch. Would three spaced out evenly over a distance of 3.7m give me enough force to punch the 11 hole simultaneously. Anyone got any ideas or tip on how to work it out let me know please. Thanks

Self charging Car

http://news.nationalgeographic.com/news/2002/01/0117_020117TVspidermammals.html There are still more current links surfacing on this from the likes of ABC but I've not gotten to them & I'm partial enough to NatGeo.

Hi, I want to know what actually does it mean to get a paper published as in what one gets after doing it (some reward or something??)?? Like, people go to conferneces to present their research paper.. does it mean that it has been accepted and, what is a patent.. how can we use our research for starting anew business??

I'm trying to build a subsonic ramjet to try and get the technique down so I can make a cluster to put on a go-kart, bicycle, or lawnmower. I've looked all over the internet and the only reliable science and math I can find is for supersonic ramjets or from a hobby forum that doesn't really seem to understand math. So basically what I am trying to find out is how narrow my diffuser needs to come down to and the length of diffuser, how that relates to the combustion chamber and nozzle, and the best shape for my fuel injector. If you can give me the equations it would be greatly appreciated.

I want to develop a nanosuit. Like the one in Crysis. It's basicly nanomaterials that adjust to certain situations. They change shape to withstand blasts, become invisible (reflect light), increase speed et c. and they connect to the nerval system. You controll it with your spine et c. What field would be more likley to give you the chance to work with stuff like this? Engineering Physics? Medical Engineering? What?

Anyone know the dimensions of the world's smallest coil spring and what it has been used for? A quick "google" did not throw up any clues.

if i feel cold when some cool air passes me ... wht is the moisture? relative humidity? amount of water vapor ? ..... if i feel cold is there any water vapor ? ..... if humidity is high wht is relative humidity there? ........ plz help me to understand these topics !!!

http://www.usatoday.com/money/world/iraq/2003-04-15-kevlar_x.htm-- I was always fascinated by this encouraging factoid, neat it was still cropping up in newsbit even as recent as here...

Henry Markram: Simulating the Brain — The Next Decisive Years [1/3] Henry Markram: Simulating the Brain — The Next Decisive Years [2/3] Henry Markram: Simulating the Brain — The Next Decisive Years [3/3] Henry Markram, Ph.D., Director of the Blue Brain Project at École Polytechnique Fédérale de Lausanne, speaks at the International Supercomputing Conference 2011. Not sure where to post this, but this is a giant engineering project, is it not?

hello everyone I study boundary command in manual lamms but i can not undrestand boundary shrink−wrapped please help me Thanks in advance

Carbon nanotubes are being researched now for their ballistic capabilities. They are said to work extremely well, and be extremely lightweight. I also read that they can be used for muscular replacements because their reaction to electricity. When electricity is applied, is flexes like a muscle. So could these two properties be combined to make suit of performance enhancing armor?

I need help. How can I build an airplane out of paper, cardboard, or construction paper, that is capable of carrying an egg 20 feet at least and land safely without the egg breaking or falling off when we throw them off a 2nd story balcony?

I currently live in Ontario, Canada where we employ 16 nuclear reactors to produce just over half of our electrical needs. It's something I never really think about, until now. With the crisis in Japan it has become a nagging question, are our reactors safer than those in Japan? It turns out here in Ontario, we use one of the most expensive designs in the world, which just happens to be a Canadian design, called a CANDU reactor. Meanwhile in Japan, the reactor in question was one of the designs from the 60's called boiling water reactor. Here is a great link that directly compares them: http://www.enviralment.ca/2011/03/23/nuclear-power-facts-the-differences-betwe…

ATP is basically a naturally rechargeable battery, why not just manufacture that? It completely solves the problem of storing energy and it already makes use of the energy the Earth already recieves. Just let ADP sit out outside during the daytime so that it becomes ATP, then just put it in an car designed to use it little bits at a time to transform the energy released from it into mechanical energy.

Graham Palmer, industrial engineer from Melbourne

i need a massive amount of energy, and i intend for my skaters to give it to me. i'm looking for a way to harness the motion of the skaters across the ice. it should give enough energy to keep the ice cool. (this is a daunting task, and will rely heavily on my ability to, later, design an effective cooling system) any suggestions?

What type of sand is used to cast bronze, brass, steel and aluminium? also what are their shrinkage rates and melting points?