Engineering

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?

I was wondering if electromagnets could substitute gunpower. If you could have multiple with a charge on one spot, could a bullet be propelled forwards with the same effects. Possibly working like a tiny rail gun.

What is the meaning of hydraulic retention time (HRT) in anaerobic digestion?

Hi. Trying to find a vendor in USA and can only find a picture. Perhaps I need the correct terminology. Edited - added : It is used to expand hose ends and other whatevers.

There appears to be something in the natural environment , that steers a little bit away, from having an IDENTICLE COPY ? I think ? Even if it is a " round peg in a round hole " ? Thinking of Atomic Particles, Reproduction in living things ( plants and animals , ) . Not sure about microbes ? Even today's society forbids , outright plagiarism,( some difference required ), copyright infringement , etc . Is there BOTH..... An advantage. and. . disadvantage ......in having IDENTICAL THINGS . Clearly a wheel and axel need to have slightly different dimensions to function at all. * Perhaps there is a principle here? Not sure? Mike …

The attached youtube video shows a man moving multi-ton stones with sticks and stones, no heavy equipment. The sticks are mostly dimension lumber (e.g., 2x4s and 4x4s, IDK metric for these). For example, he lifts a 20 ton block several almost a meter (yard) by making two fulcrums less than a meter apart, and uses a teeter-toter motion of the block to lift one side and then the other one 2x4 at a time. He also plants one in the ground as a monolith. And rolls heavy blocks with ease. If the Egyptians and Celts moved stones with these techniques, it was easier than I ever imagined.

Hi everyone, I am trying to build a device hat requires a rather strong pushing force (500 gr. 1000 gr.) within a rather limited space. (9X15X25 mm) with an 8 mm stroke. This force would be required at full extension. Since solenoids, voice coils, latching solenoids etc. don't seem to be strong enough or have a long enough stroke length I thought taking advantage of the power of neodymium magnets towards an electromagnet. Supposing I'd be using a 9 mm diameter and 3-4 mm thick N52 neodymium magnet, could and electromagnet stick to it with a holding power of at least 500-1000 gr.? And will it be able to detach from it by reversing the current? hope someone can help…

I am a ninth grader at The Galloway School and for my science fair project this year have chosen to create a better hoverboard. The Lexus hoverboard intrigued me and I thought that I (or someone else) could make it better if it didn't have to use a track. This is my plan: Design Problem: One paragraph describing the problem a) what is the problem you are trying to solve or thing you are trying to improve b) why you chose it/why does anyone care/how is it relevant to real life You must have at least one parenthetical reference to your research here or in #5 Design Brief. I am trying to improve the Lexus hoverboard. The Lexus hoverboard is a board like a…

Hi. I believe I do understand the 'normal' magnetostriction, when transformer core materials shrink/expand mechanically with their exposure to magnetic fields, but have difficulty in how minute compressions/expansions may generate enough electricity to consider it viable as power generation. ----> http://earthtechling.com/2013/05/doing-wave-energy-with-no-moving-parts/ ----> http://www.greenpatentblog.com/2015/12/01/oscillas-power-bars-generate-energy-from-waves/ Light, please ?

Hi. Bought a property. It has a 1m diameter, 1m deep sinkhole by the front yard, 5m from the house. The concrete block foundation shows zero signs from being affected, not even a hairline crack anywhere. Neighbors from the area say it has always been like that. That when filled by previous owners, very slowly soil caves in. Do not know what 'very slowly' means. Guessing, takes a year or two to need refilling with dirt. There is a confirmed no relation with a mains water leak. Sewer lines are distant and PVC. No foul smells emanate. Terrain is very high in relation with the rest of the neighborhood. Could be said there is very little higher terrain around, bu…

So I got some ideas about ways to use 3D printing. To being with, let it 3D print a computer with all the available circuits and working structures like mother board and graphics card. Next, 3D print a factory of a large scale, it could be any factories and Chinese has a good example of 3D printing a house, just need some mechanical parts for the factory. You could also 3D print a 3D printing machine, the more the merrier. Lastly, 3D print a nanoscale factory for nanomachines.

Where can I find (and buy) relatively cheap superconductors? Thanks, Owwen

Hi, I recently watched part (the end) of a technology programme on CNN or the BBC. It was about a new fascinating, revolutionary "sci-fi" technology of "etching" an unbelievable amount of data onto an "indestructable glass(?) carrier. The segment was too short, so I can't be more specific. Has anyone heard of it and knows the precise term for this new technology? Have not been able to find anything on Google. Thanks! 'Mike the Fritz'

https://webcache.googleusercontent.com/search?q=cache:dII1QJHWYlUJ:https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19870001331.pdf+&cd=1&hl=en&ct=clnk&gl=ca Can mhd generators really be that efficient (70%)? If yes, why they aren't widely used yet? Which methods could be used to dissociate water molecules present in water vapour in mhd generator?

Have you ever touched an audio jack while it was connected to a speaker? You might of noticed that the current from your own body created electrical interference causing sound to be played out of the speakers. Did you know that if you rub the audio jack against your arm you might feel as if the audio jack is rotating? What a strange phenomenon! What if we could use that same technology to somehow feel a sense of touch in virtual reality? Let me know what you think!

So you guys know that there are cars which detect when it is about to bump into something like the Google car. Can we apply the same thing to humans? We know humans bump into humans at low speed is not dangerous, but if you are about to hit a driving car you'll wish that Google car mechanics is applied on you lol. Anyway, personally I think the output would be like a noise, since you can't really control a person to stop. Or a glasses that display message, or some mechanical force that would swing you side way, or make the car stop with RFID. I think this would be pretty cool This is the current Google self driving car overview. I'd say either implement the collision de…