Engineering

For a project I need to find out if there are any solid materials that disinfect hands upon touch. I know there are anit-bacterial coatings and nanotechnology that disinfects the object, but is there anything that would disinfect whatever touches it?? Any help would greatly appreciated!

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I was just watching a rerun of the Tonight Show. However, that news point doesn't say anything about the sense of touch. This would severely limit the possibilities of this helmet. I mean, if you can't feel where you are, then I guess... so much for having a roller coaster in my own home. I mean, it's a helmet, isn't it? Can't they just cause the cranium part of the helmet to transmit messages to your brain, and therefore to the rest of your nervous system, to simulate these feelings? But, I guess it isn't entirely worthless. I mean, I'd love to be able to go see a live professional wrestling show whenever the hell I feel like it, instead of waiting p…

I read something (zpenergy) that supercapacitors are being strongly developed to usable battery capability. Who's got the scoops here? We need such things in many application scales. I remember the Princeton tokomak with its own two-story flywheel and walls of capacitors, to average the grid drawdown with pulsed operation.

They say this problem was fixed and it will not work.They say this was the problem in the old days and now it is fixed. +++++++++++++ Can a rocket engines be inprove by doing the following things? Can we get a rocket engines more powerful and fuel efficient by re-designing the combustion chamber ,inproving the thrust chamber ,amout of fuel burn or the layout of the thrust chamber where the oxydizer are mixed and burned? And cutting back on moving parts and heat ?I just thought inproving the combustion chamber or new layout of the combustion chamber or a new state of the art combustion chamber . Or cutting back on moving parts or heat.Or the amout of fu…

How could a permanent magnet electric motor be built/designed for slower rpm turning shaft but with 'normally' high commutation speed (passing of magnets in front of coils) ? Would a 60cm - 100cm diameter motor just ~5 cm thick -disc shaped motor, with a large number of magnets placed at the peripheria and a corresponding large number of coil poles do it ? Being the magnetic propulsion forces at a 'large' distance from the shaft with a large tangential speed use less force to produce same high shaft torque ? It is hard to express in writing, I hope the above is understandable...

After moving a lot a firewood for the cold month of January, I am gratified to see that my electric bill for 30 days is less than $45. This with only a handful of early morning (4 am) heatpump runs with the t-stat set at 65 F. Bear in mind that I have a very mid-sized woodstove, 1.6 cubic ft. firebox, in a 1900 sq. ft. house built in 2003. One and one-half bedrooms are my piano shop.

Hi all. I recently graduated from college with a degree in engineering. After six months of unemployment I got hired by a science company as a ‘research associate’. It was what was available, that was paying acceptably. My roles vary, it is a small company, but essentially I am responsible for physically evaluating materials in a scientific manor. I have to rig up test setups all the time, so I’m not sure whether to call myself an engineer or a scientist. That type of engineer is even called ‘material science’. I know how to program, I’ve automated the whole data analysis portion of the work which has cut down the analysis times dramatically. I guess what I take fr…

Whadda ya think of the Toshiba S4? Why couldn't these little nukes be used in any community as a local power source? It could dramatically alter our energy infrastructure and our dependence on foreign oil. Safer and cleaner. I'm not so sure about cheaper. But maybe the Toshiba S4 has more universal application than just the Yukon. I like the concept.

To clean the debris in space, caused by satellite crashes and destruction of military satellites, we could build a space cleaner. Since it's already a vacuum up there, it could be called a vacuum cleaner, but I that might cause some confusion. I thought of on-purpose collisions with debris, deflecting debris into the atmosphere where it can burn up. Is there any armour (any material) that can withstand a collision at... say... 20000 km/hrs? It should be able to survive a head on collision with something orbiting in the other direction, and then be overdimensioned a bit. Let's ignore the fact that it should not be too heavy. Let's say we can put a tank into orbi…

having spent many hours in bed (due to illness) and watching Movies on the laptop, I had an Idea for 3D goggles this afternoon. the Idea is that you wear these glasses and look through a single LCD plane with each eye, these take turns at going Black. the Frame rate for a movie is normally 25 per sec, so a 3d movie would require 50 FPS. all the Even numbered frames are only viewable with the Right eye, and the Odd number frames are for the left eye (just for instance). so due to Retinal retention, you`ll in effect be seeing one image with the left and another with the right Seemingly both at the same time but from the same 2D screen. now if those images w…

Economics First of all, the real calculations start after this paragraph. This paragraph is a bit of a test for me. It might contain mistakes. I just wish to learn about investment - I know little about it, but I have some ideas that need testing. I believe that wind power has an added value (saving the planet and humanity). Therefore, I think that we should look at the construction of wind power not from a point of view of competitiveness with fossil power, but from a point of view of a stand-alone investment. In addition, while fossil energy will cost money all the time for exploration, production, transportation and so on, wind electricity will have a certai…

What will happen if you concantrate sunlight on a solar panel. Will you get more electricity from it or will it only heat up.

Damn it I spelled Dofasco wrong........... Electric vs. Gas Smelting Furnace........................... I haven't really looked into it but from a logical point of view they both seem to have advantages. Electrical: -no need for gas -can power from an electrical outlet or generator of adequate power -zero emmision heater -higher efficiency; less loss to surrounding atmosphere Gas: -easier to repair ceramic containment vessel -.................. any thoughts in general...................

How does a couple of birds take out an entire Boeing 737? I would have figured the engines could chop up the birds into little pieces without too much of a problem. http://en.wikipedia.org/wiki/US_Airways_Flight_1549

Some devices used for delivering insecticides into open areas operate on "thermal" principle... How is that in detail ? I do not think it is just matter of heating-up the fluid under an air blower flow. Any light please? Example : http://www.dynafog.com/international/foggers/ Miguel

I am trying to size a heat exchanger for a solar water heater. It seems that most people online tend to either buy a prebuilt exchanger with some arbitrary "good for 3 people" rating or just wing it. I googled to death but either google is to dumb or I am too dumb to find the answer. Id like to take what I know which is: temperature of incoming water temperature of water in holding tank volume / second of incoming water heat volume of water (4.18 kj/kg) where 1kg=1liter so if I have 40*F incoming water (using *F for degree symbol) and have 160*F water in the holding tank, how many square feet of surface area do I need to get the 40*F water up near 160*F? …

I'm looking for books/texts on automotive monocoque chassis design. Can anyone help?

if we took an electric car and put energy turbines in the wheels would it be possible to power the car without having to charge it up every 5 minutes

How to build solar panel...

HEY Y'ALL, Why is a pencil made with 6 sides? I know that they make round pencils so the hexagon shape can't be for grip. Any suggestions?

Can anybody comment on electric tractors . If you use an electric tractor to plant corn for instance and generate the power by solar and wind can that qualify for carbon credits. If you compare biodiesel with electricity generated by wind and solar you will use a much smaler portion of land to generate your energy needs.

i need more info on about the above title so please help me with info please provide info about the feasibility

In discussions about hydrogen fuel cell vehicles, it's frequently said that "the infrastructure" would have to be in place before they could be practical, and the infrastructure itself wouldn't be profitable unless vehicles were widespread. Ok, so my question is: what infrastructure? I guess it boils down to me not really seeing why you couldn't treat a hydrogen fuel cell as a rechargeable battery. Instead of having water vapor as exhaust, why not keep the water in the system? Then plug in the car to supply electricity for separating it into hydrogen and oxygen. Keep the hydrogen, let the oxygen go. Sure, the car would get heavier as you go, but not by that much, and …

Hello, im struggling with what should be a simple problem but I just cant get my head around it. Basicly, if 8kg is needed to move an object horizontally at 0.25m/s what is the force?. (It's not just f=ma is it?). Thank you