Engineering

what is a motherboard made of and how would i make 1 i have a budget of 1000 dollars in this hypothetical scenario and would only like to print 1 if you could help me it would be of great thanks

I was thinking of painting a copper plate with, maybe black spray paint and leave it under the sun, will the copper plate heat up faster than without black paint? How efficient will the heat transfer of paint to the copper? What is the best kind paint to be used?

Greetings. Do you know of a simpler simulator program on the web to find times a model submarine takes to sink to bottom of a reservoir; and time it takes to reach surface from bottom when its buoyancy is changed/controlled ? Thanks

I like to bring my toothbrush to work and brush my teeth at work, but sometimes I forget to bring my toothbrush. I was going to leave one at work, but I can't leave it in an airtight safe or it won't dry properly, and I can't just leave it on a cup in the office because I don't know if my coworkers might use it and I might catch whatever diseases they may have. Is there any lockable container I can put something in, that I need a key and/or combination to access, but that allows anything put in it to dry out?

Im looking for a simulation software the can simulate how liquids compresses when done this way instead of a linear compressor. Black is a solid wall, lets say the chamber is indestructible and we can apply as much compression as we want. I wish to know how much energy in kw is required to compress them so much in the center and how much pressure there is in the center. What I want to achieve is fusion, tho I just want to compare how much more efficient this design would be compared to others that use linear methods. I would like the chamber follow the golden ratio. Even if everyone says this wont work or anything, I just wanna see what happens

Hi all. This not numbered ball bearing tells by dimensions to be a '6201ZZ' type; but has a groove where a staple-shaped piece lodges-in. Set aside to show the groove where fits. Is there a nomenclature suffix for such feature that you may know ? It has only a faint "USA" marking, but it is metric, from the seventies as far as I can tell.

Roads are often the go-to example of things that need to be a public service. I've always thought health care was a stronger example, given what happens in countries where it's public vs. where it's not, but I'm willing to entertain the idea that roads are a better one. For the purposes of this thread, I want to put aside all concerns about whether toll roads are unfair to the poor in and of themselves. It's not that I want to trivialize that; I'm absolutely concerned about it and I think both Canada and the USA could do with a stronger public sector; but there was one specific aspect of road privatization that stands out to be more than its effects on the poo…

i was wondering if some one can create a time machine with magnets and electricity at a college because they have the tools or a university

What about the question: Can musclepower be used to improve energy-generation?

or ,are there any specific research that might support this idea?

Hi all. Does anyone know this new crap about hose sizes ? Trying to find 1/8 inch or 3mm i.d. hoses; found this. Have these geniuses never heard of the millimetre ? What entity governs dimensions and terminology ? ----> https://ph.parker.com/us/en/hydraulic-constant-working-pressure-hose-5000-psi-globalcore-787-hose

I have a nitrogen stream that I need to find out the max flow in SCFM from a 1/4" tube at 50PSI. What is the best way of determining this? I dont have a pitot tube, what can I do? I broke my anemometer trying to measure this. Thanks,

Hi. Noticed in some non-residential buildings, that toilets drain the waste brutally fast. Is there any vacuum implementation of some kind in modern/specialized sewer plumbing like in hospitals, hotels... ?

I really like the book for how much it covers. There's not a single topic that's missed that is relevant to nuclear reactor design/analysis. Often other books can miss a topic or two. It's just that the style is not to the point and often time is wasted talking about things that are irrelevant or won't be explained, at least until way later.

So long as two-way roads have a grid structure, every intersection will include an option for turning left a green light. And every time a driver makes a judgment call on whether or not it's safe to do so, this risks getting them killed. I'm just wondering, wouldn't one-way streets create fewer options, per intersection, on which way to turn? For instance, if a north-heading street met an east-heading street, the north-heading cars could only turn right onto the east-heading street, not left. The east-heading cars could only turn left onto the north-heading one, sure, but you could also reserve one lane for traffic that is "joining" the street, suc…

Hello dear friends! As an alternative to heavy pressurized tanks and to complicated turbopumps, an electric pump can feed the propellants in the chamber(s). Conceivable at small chemical thrusters, where a high pressure improves the efficiency and injects enthalpy from the Solar panels. ----- Scale up: electronics can control 1MW motors from the main's voltage. A 70% efficient centrifugal pump brings then 72kg/s of oxygen and farnesane C15H32 to 96b; expansion from 80b to 0.02b in a 2.6m nozzle to push 260kN with Isp=375s, enough for the main engine of a 30t upper stage. Rotating at 780Hz in vacuum, the motor is small. Its rotor can be a permanent magnet of Magneto…

Hello. How to find at which pressure, which edible oils ignite/decompose ? Where to look for such data ? Say plain soybean oil; will it withstand being pumped/compressed at 6000 psi / 400 atm ? And other edible oils...

Hello everybody! I've spent some time comparing rocket propellants suitable for pressure-feed at a launcher, and have gone away from oxygen-methane and cyclopropane to room-storable fuels (and liquid oxygen). Though they may offer a lower specific impulse, the tanks they need are lighter, resulting in slightly better stages - and safer if the fuel leaks and ignites less easily than a gas does. Amines outperform hydrocarbons as well. The heaviest tank stores helium, and cold liquid methane needs more helium than a room-temperature fuel does. Also, a reasonable layer of microballoons-filled polymer can insulate the fuel tank from the colder helium tank and keep a si…

I have already created a post on another forum for the development of a new type of Stirling engine. The new concept is radically different from the Stirling alpha beta gamma engines. I'm looking to significantly increase the heat transfer exchange time. It takes two engine revolutions to make a complete cycle. On the other hand, the Stirling engine is in engine phase every half engine revolution. My site presents the engine. advertising link removed by moderator I'm looking for an industrialist who wants to develop this engine. One patent has been filed

So last night I threw away some aluminum foil. It was in contact with food I was using it to keep warm, I didn't think I'd have much use for washing it and saving it, and I thought nothing of it until afterwards. I just realized... if there were some program to collect everyone's pre-washed aluminum foil, and/or wash it after collecting it, it could be arranged in an increasing variety/size of concave shapes, be used as a solar collector, and boil water, whether to distribute energy directly as heat, or to turn turbines and generate electricity. So why aren't we doing this? Have the fossil fuel and nuclear industry lobbies bribed politicians into n…

So I'm just wondering, short of building an outright bridge, what would it take to impede waves travelling through a strait? If one were to build barriers around the strait, would floating ones be adequate, or would they have to extend all the way to the ocean floor? Would they need to be on both sides, or would just the one upstream from the highest waves be enough to block out those particular waves?

I thought this may pique the interest of some contributors, bearing in mind the recent conversations about law enforcement, guns and alternatives to killing people... The UK government has launched a competition to develop an Advanced Less Lethal Weapons System. https://www.gov.uk/government/publications/competition-advancing-less-lethal-weapons/competition-document-advancing-less-lethal-weapons The UK's current hands-off less lethal options are incapacitant sprays (~4m), Taser (~6m) and baton rounds (~40m). I've used all three and one major obstacle I see with a 'one size fits all weapon' is how to make it effective at 50m without being haza…

Im detecting noise coming from a servo amplifier and its effect on a nearby signal cable. the received signal is being split into two mirror copies about zero. What is the reason for this? How can I show just the one signal. Thanks

So I work at an office that is constantly warm in the summer, especially when the sun is facing the window. It has blinds, but those blinds aren't fully reflective, and I'm not sure if there is any legal liability to putting tinfoil outside them. However, there is another tinfoil-involving alternative that might work; indoor concave mirrors to collect solar energy. https://www.youtube.com/watch?v=8CLRTa_ocmo I'm thinking if I did something less precise, but still in a general concave shape, to concentrate all the solar radiation entering the office through the window on a darkly coloured kettle and use this to boil water for coffee or t…

Hi guys, i am new to this website. After reading the kind of subjects i decided to write my own post. As the title says i have had an idea of connecting a valve directly to the cloud, so you can command and read data from it using MQTT/API, no mistery there. I will explain a bit about how i got here. I am a professional embedded developer, in my own time we have developed an algorithm that detects the flow of water just by listening to the sound it makes on pipes using Machine Learning(this is the really cool part). So far so good we actually can detect if there is flow and give a quantity of the instantanious flow with a max error of 10%, just by attaching a s…