Engineering

Hi, I have a problem. I need doing simulation in AnSys about explosion methane (as gas), unfortunately program has not such material and I do not know explosion parameters of methane (8.5% in air). I am enclosing picture with parameter of TNT (AnSys has material TNT), and does someone know about what parameters should has methane gas and could you share with me? Best regards

I have a really neat idea. Engineers should be able to build a car that travels on land, air and sea. The main method of locomotion would be in the wheels. For travel on land, the wheels would be vertical, and travel on roads, which of course is possible. They are just called cars, or possibly landcars. For travel through the air, the wheels would slowly turn to a horizontal position, and start rotating within the tires. The wheels would have small wings in them, which would provide lift when rotated. The car could take off and land vertically. The cars would be called aircars, skycars, or flying cars. For travel on the sea or lakes, the car would be driven…

Hi, I see a film series on Netflix called "Better Call Saul". There is a guy called Chuck (Charles). He is allergic to electricity so he can sense if there is electricity. His brother had a guy put a fully charged battery from his phone inside Chuck's pocket without him noticing it and he didn't sense the electricity. Therefore his brother though he was mentally ill. I wonder, is there a current if the battery is not in use? Should he even have sensed it or is his brother mistaken?

Was anyone watching this? It took a long time for the news to even mention that firefighters were trying to get close. It took a half hour for ONE fire hose to start on the fire. Can anyone figure out what is wrong with the performance of the Paris Fire Dept? I suspect that the fire trucks had trouble getting through barriers for terrorists. Why not scramble tanker planes to drop water on the fire? Were there any local fire hydrants? Can anyone figure out how to prevent this happening to other historical buildings? Maybe install a sprinkler system, I don't know.

Hello everyone. As part of a school project, I would like to make a machine similar to this video: https://www.youtube.com/watch?v=VtTZ855O5ds&t=107s, to convert the mechanical energy of the swell in electrical energy.However, with little knowledge of motorization etc, I would like to know what types of generators and / or DC motors would be most suitable for the system presented on the video.Thank you for your help.

I'm doing a project that requires gears and don't need/want anything expensive, so those hobby gear-kits look like they'll work, but I need the gears to be a specific size, and the only ones I've seen just come in standard sizes. So I was wondering if anyone knew of a site online that sells inexpensive plastic hobby gears custom cut to size? Thanks.

Hello nice people! Metal Matrix Composites (MMC) mix ceramic powder, nanotubes, other small things with a matrix of metal like magnesium, aluminium, titanium, iron alloys. The goal is to increase the stiffness, the compression resistance, have a small density, and hopefully keep a decent tensile resistance and toughness. I haven't searched for long, but apparently they use a single range of particle size, to about 40% volume filing factor. Though, a suspension becomes quickly a slurry, and with about 40% volume of solid particles, it doesn't flow any more. I understand that particles touch an other as their arrangement isn't optimum, so they immobilize the suspension,…

I'm currently trying to choose a lattice structure/geometry that finds the tradeoff between strength (for compression & shear mostly) and heat transfer. I want to maximize strength and minimize heat transfer through the lattice. Does anyone have any recommendations on this front? The less material, the better! Thanks a ton in advance.

How to neutralize mind control please?

Anyone have any suggestions for a strong material that can be used in a 3D printer, but has super low thermal conductivity?

Explosion and reported brief radioactive contamination at a Russian missile test facility in Nyonoksa, 47km from Severodvinsk https://www.bbc.com/news/world-europe-49301438 https://thebarentsobserver.com/en/security/2019/08/latest-rosatom-says-five-employees-killed-blast-while-testing-isotope-and-liquid https://www.france24.com/en/20190810-russia-says-five-died-missile-test-explosion https://www.rt.com/russia/466194-rosatom-killed-arkhangelsk-blast/ https://www.thedrive.com/the-war-zone/29356/russia-admits-mysterious-missile-engine-explosion-involved-nuclear-isotope-power-source the newspapers of varied origins and quality seem to have very few sources, Rosatom and the …

Hello I am building a spacecraft at my garage . For engine I have compressed air inside a closed box and by pressing a button I create a small gap where the air could come out . My box is made of a material tough enough to resist the pressure of the air inside . Also it is not very ductile meaning it cannot be easily plastically deformed resulting in reduce of the pressure . Now I want to make the body of my spacecraft.Any ideas? P.S I want to go to and die at the Moon so I can have the incredible view of Earth for the rest of my life.

Is this concept acceptable for a non-nuclear atrocity believer? HIGH BANDWIDTH CONVENTIONAL SUBMARINES CLOSE TRANSFER WITH THE GROUND Maybe, we could achieved an international network, dedicated to nuclear submarines efficiency, that way reducing the response time, so the risk associated with such lag responses :() :() :() The formidable investment, will be rewarded by a new era of stability :() My first estimation, for a complete network mapping of all oceanic floor, in case of an alien invasion : 361 132 000 km² of oceanic floor 361 132 000 / 25 = 14 Millions km …

Hi. These single-hose 'portable' airconditioners... how can they cool any room at all ? The hot exhaust expels the heat from its condenser cooled by the room air cooled by the evaporator + the heat extracted from the room air by the evaporator + the building heat entering the room under the door and leaks + the compressor heat. Can someone explain ?

ok new to this build i have made my tesla coil and got it working but not very well ,,i am lost on the capacitor bank .how much i need in the way of nf and voltage . i used a program that says i need 8nf to rum mine but, what i dont get it i see people with big mmc and high voltage .. so what is the best way to get the nf i need with high voltage my first coil right now only has 15oo volts at 4 amp going in ,, i am waiting for a couple parts for bigger any help would be great

To me engineering is the manipulation of science, the light bulb being the best example. I was reading about the graviton, apparently it's so small we won't be able to do anything with it i.e. Manufacture it for use in industry. If physics is at the stage when it's discoveries are at this point, does that mean there are certain areas of engineering where it will no longer be possible to come up with new ideas. or are there so many different variations of chemicals etc that we can continue to come up with completely original ideas indefinitely?

If you had a square faraday cage grounded at the bottom and wanted to "add 5000 volts" is only instruction I saw. How would you go about that? I only heard that 5000 volts were added to the exterior of the faraday cage. What would be the simple and cheap ways to add 5000 volts to the exterior of a Faraday cage for fun or folly?

Majority of Western European countries have outlined the date when they will prohibit cars based on internal combustion on their roads. Typically these dates range from 2025 to 2040. The similar initiatives are attempted in India and China. I have hard time to believe it is realistic. Do you? What technology are they going to implement to make it real? Maybe what they've meant is plug-in hybrids rather than all-electric? https://money.cnn.com/2017/09/11/autos/countries-banning-diesel-gas-cars/index.html

Hello, I am currently writing my thesis, where I have to investigate if a surface treatment increases the adhesion (between tape and a plastic surface). For this purpose, I have among other tests, performed a tensile test between the tape and plastic surface. The tensile test can be seperated in two: 1)To test the adhesion between tape and plastic surface (when the plastic surface has not been treated). I will mark the results 2) To test the adhesion between tape and plastic surface (when the plastic surface HAS been treated) My results are: 1) The mean for th…

I was turned on to this site the mentions a Project Thunderwell that may have sent the first manmade object into space before the Russians. http://www.geocities.com/CapeCanaveral/Hall/1892/sputnik.html I bet it would be hard to tell now that it was manmade. Just aman

Simone Giertz wanted a Tesla pickup. So she built one. Or, rather, converted a Tesla 3: (As some of you may know, I don't think many videos are worth watching but this one ...)

This thread was inspired by the following comment in this query about air conditioning. But is that so ? The change in entropy going from state A to state B is always the same, irrespective of the path between A and B since entropy is a state variable and thus a function of the state of the system alone. It make no difference whether that path is reversible or irreversible. Only in the case of a reversible path is the entropy given by the expression [math]\Delta S = {S_B} - {S_A} = \int_A^B {\frac{{dq}}{T}} [/math] In order to calculate the entropy change for an irreversible path we must find an alternative reversible method of …

Would it be possible to generate a working hologram by manipulating photons in some sort of quantum field (or electromagnetic, but I don’t think photons have magnetic properties)?

Hi, will it be possible to make diamonds using super strength magnets? I was thinking about being able to make diamonds like thin sheets of glass instead of really small like they do now. If you could, could you make the diamond so thin it would be flexible? I was also thinking about all the applications of mass produced diamonds and maybe it would be good way to use the carbon from carbon capture programs. What do you think?

I have tiled countertops in my kitchen but I accidentally dropped a heavy pot on my counter so it cracked instantly. I am looking to either replace the countertops with someone more fancy like marble or quartz. Is there a type of surface that is better for countertops that can withstand a lot of heat? Thank you in advance to anyone that can help me with this.