Engineering

Hello guys, Pls, I am trying to calculate chord modulus from stress-strain curve but don't know how to go about it. Thank you as u help me solve this.

I have a practical question. I want to make a rubber (silicone) hose/plug that is pinched closed by two magnets ( very strong magnets such as ones from a hard drive the Neodymium kind). I want to place then into a coil and when I want the liquid to flow, I want to turn on the coil and have the magnets pull apart for a few seconds. (1-5 seconds) then turn the coil off and have them snap closed to stop the flow. This is meant to be repeated 100 times a day with no adverse effect on the magnets original snap together. (note: the plan is to mold the magnets into the rubber to keep them from flipping or falling out or moving) My questions: 1. Is this possible to do? 2. is the…

I notice that ball joints have that undesired creaking sound, whereas the bones in your body which are much bigger make nearly no noise when they transition from static to moving. Is there a way to keep the friction of a ball joint while making it quiet? Or alternatively, is there some kind of gear equivalent to a ball joint that uses increased surface contact with helical spurs?

So I have Astigmatism(Again with the self centered post). So I was pondering on the fact that wouldn't it be possible with today's 3D printing technology to print corrective lenses for it? I kind of feel that it wouldn't be able to achieve that level of flexibility and softness. But acquiring the shape of the desired lens for the given refractive error would be possible right?

Hi. In short - my interest in gliders has sparked a question if a high aspect ratio transport aircraft would be possible from an engineering POV? The aircraft would possess a high lift to drag ratio (>25) and would be able to fly for a long periods of time and fly shorter routes with less fuel consumption. Cruising altitude would be between 45-65,000 ft with a possibility of making completely unpowered descent and landing. A spy plane of simialr configuration entered service in USAF (Lockheed U-2)

I am going to start off by saying that I am a 15 year old kid with an idea that has probably been thought of before, but I thought I would share it because I want to know whether this is actually a possibility or not. So we all know how wind turbines work. They use the wind to spin a turbine which then powers a generator. The problem is that wind is not controllable and as a result our power gained is inconsistent. What if were able to utilize the excess amount of CO2 in the air to generate power at a consistent rate? What I have in mind is very similar to how wind turbines work. First, imagine that you have dry ice inside a bottle and you put a balloon on top. Th…

Hello folks. I'm a 3D designer. And my father's a mechanic Simply I have an idea for a lighter engine. My Idea uses already available technologies. I want to talk to someone about creating this idea. At the same time. I don't know if it will work. But as far as I can tell the science is sound. How do I not get it stolen? Who should I contact? Thank you.

Hi. Can someone explain how these units work, please ? As far as I understand, please correct : In summer heat, the compressor liquifies the refrigerant, it is cooled to outside ambient and evaporated inside the dwelling to absorb heat. In winter, the refrigerant flow is reversed by an electrovalve and the compressor liquifies the refrigerant and heats it, with its heat being released inside the dwelling. The cooled gas that delivered heat inside goes back to the compressor outside and is compressed/heated again... About efficiency; how can these systems be claimed as more efficient in winter; if a kilowatt is a kilowatt. The energy the warm compressor use…

Hello everybody! Neurology uses Transcranial Magnetic Stimulation (TMS) for research and sometimes diagnostic and treatment. Introduction there: http://en.wikipedia....tic_stimulation Some documentation there, but other manufacturers exist: http://www.magstim.com/ As I understand it (but beware I'm bad on biology and neurology), not the magnetic field, but the gradient of electric potential and current it induces, creates the desired effect on the brains. The action resembles partially an electro-shock, but: The skull is tranparent to the magnetic field, while it hampers the electro-shock's current; Hence the skin isn't as brutalized by TMS; The path of the…

OK - It's 2017 and surely it is time to redesign the standard toilet bowl. I believe it is discriminatory towards men. Girls won't have the same problem as we men do and some men just do not talk about or just do not care... even so it is time to 'tackle' the problem. The standard toilet basin does not give clearance for the male appendage at the front of the bowl. Every time I sit down on every toilet seat I need to use a hand to tuck myself back so as to avoid the unpleasant cold and dampness of the porcelain touching the most sensitive area on my body. I always find this unpleasant and pretty disgusting. I am SURE I am not the only one to have this problem. W…

Dear All, Suppose I've got a medium (like a soil) of a homogeneous and constant resistivity Rho (in Ohm.km). This medium is put into a big cube of 1km side, then giving a km3 of my medium. Now suppose I want to model my cube by an electrical circuit with resistors at each side of the cube. May I state that each resistor will be Rhox4 then ? No suppose I divide my km3 into equal 8 cubes of 500m side each and suppose I still want to model this arrangement by electrical resistors. What should be the value of each resistor/side then if I need that the whole set still corresponds to a resistivity of Rho ? I propose Rhox9/2. Am I right ? For these who know Matla…

Dear people, I need advise on a electro technical issue. Maybe you have already seen this scientific toy, a magnet train: Instead I believe it is not just a toy. The theory When you have a wire, you put current on it, let's say 60 hz/s, it will conduct a frequency of 60hz/s current. When you have a wire bonded with another wire for five rounds, the wire will conduct 60 hz/s, and create electromagnetism of 5hz/s When you have a wire 60 times wrapped it will conduct 60hz/s and create a boost with 60hz/s. The magnet must be set to flow for the time needed to create 60hz/s wen your current is flowing with 60hz. If the current is at 10…

Hello, need a really large piece of glass for a project and am hoping you all could help. Also, I would prefer for the sheet to be made from Pyrex glass. Thank you

I have question on using an alternate valve in a project I'm doing. I using a pressurized fuel chamber to make a fire saber. My question is do I have to use the SGE syringe valve 031915 or could I use a Solenoid Valve instead Many thanks in advance

Link removed 10.11648.j.ajmp.20130203.17-8.pdf

Hello. I am working on a project to build a model satelite with some functionality. Communications, Payload Sensors, Attitude sensing, robotic arm, solar panel and a simulated RCS. We are restricted to low budget and i would like to know what types of sensors (arduino, raspberry pi compatible) we could use to measure e.g. prescence of certain chemicals-->spectrograh and magnetic field, eath's surface relief etc.

This is what I have in mind. I am buying a mobile of XYZ company. The mobile comes with many features. How do I fully utilize these features? How do I know I have got a genuine piece?

Dear All, Does somewhat know this software well ? I'm trying to get potentials in the ground but below the surface of the soil, and what I only managed to get so far are potentials on the soil surface. This does not surprise me since this software is intended to calculate step and touch potential for people staying or walking ON the soil, and not for dead people buried in the ground... If Cymegrid cannot achieve this, would CDEGS do the job ? Thanks.

Dear All, I would enjoy your help on electrical geophysics . Suppose a soil divided into 3 layers, each of them having a different electrical resistivity (Rho1, Rho2 and Rho3, starting from the top to the bottom) Now suppose a dc current injection from a point M located at the top surface of the soil. This injection is vertical, going from the top (surface of the soil) to the bottom. My purpose is to assess the electrical potential (with respect to far earth) of a point P (coordinates : x, y and z with respect to point M) depending on the injected dc current, the coordinates of P, and the 3 soil resistivities. I've come to Bessel equations and functions…

I have a question about how something works. I work in a shop that uses coolant. The coolant comes in a barrel, and it's mostly just oil. It needs to be combined with a lot of water before being used for the machines. To get the mixed coolant, we just turn the water valve on, point a hose, and mixed coolant comes out. What I don't understand is how the "pump" works. It's just one small plastic part with no moving parts and no energy source other than the water line. I drew a crappy picture to help explain how the setup looks. A copper water pipe (orange), with a shut off valve, connects to one side of a plastic piece that looks like a T (black). The other side of …

hello and good day everyone i am wondering if it is possible to make a device that uses a electric water pump to fill a electrolysis device which then sends the oxygen into a waterproof helmet and the hydrogen into a tank and also has a motor or generator that is connected to the electrolysis device to ignite excess hydrogen and excess oxygen to produce more power. any tips/ advice or thoughts deeply appreciated. this is one is for use in freshwater. if your going into salt water then there is filter or separator in both lines that transfers the chlorine gas to a third tank.

Hello! I am absolutely fascinated with physics, and the new topic is ''jet engines''. I would like to understand them more, maybe even build a basic one, but don't know where to start. Any recommendations for literature or websites that could teach me about these things?

What to expect ? Without a driver being of mandatory presence in the vehicle, and if so, cheat placing a concrete block on the seat and send it its way ? Punch a button to bypass a valet assisted parking ? Send the car by itself to pick up kids from school ? Exit the car at the office building and send it to find a parking place ? Call the car on a smart phone to pick you up at the workplace main door ? Arrive to work place and send the car back home for the wife to go somewhere ? Send the car to the hardware store with a purchase list and get the goodies by your garage door ? Send the car to the mechanic for oil change/whatever and back when done ? Go ahe…

What all methods are used to predict the life of gun's barrel in terms of EFC?

Fluid flow is disrupted in the corners of square/rectangular passageways. The fluid tends to tumble in the corners. Can anyone tell me the name of this effect?