Engineering

A signal is variable in time domain , why we have to use transform tools(Fourier transform) to frequency domain? if so signal transformed what kind of characteristics we could get? or In which way that transformed signal is useful ? Thanking You waiting for your valuable answers.

Do you feel it could/may be useful to display Flight number electronic LCD display on Front glass panel of commercial airplanes? Example : Flight operator : Jet airways. Flight Number : 9w234 Thanks & Regards, Prashant S Akerkar

Do you feel it is useful to have pocket transistor interfacing with headphones for listening to radio AM & FM tuned stations? If yes, is it feasible to design & manufacture the pocket transistor with this feature ? Thanks & Regards, Prashant S Akerkar

Is it possible to give names with specific colour viz red,green,blue etc to the utensils with the electric operated machine pen ? Utensils materials could be Aluminium, Tin, Stainless Steel etc If No, Why? Thanks & Regards, Prashant S Akerkar

Do you feel it is feasible to design & manufacture solar panels using Carbon or Germanium semiconductors ? If yes, any advantages regarding the same? Thanks & Regards, Prashant S Akerkar

Do you feel it is useful to have scrolling electronic display panels inside Elevator / Lift displaying Flat Owners names in each floor in Residential complex and Offices names in each floor of commercial complex building ? Thanks & Regards, Prashant S Akerkar

Hey, sorry that it's been years since I last spoke to any of you, but I thought of something that would be best discussed with any physicists and/or engineers around here. There was this science fiction story I remember hearing about, where a long megastructure worked as a sort of train between Earth and an orbital space station. At some point I also heard that the megastructure would not fall down, because it was kept stable by Earth's rotation. I was thinking that maybe, by applying the same physics and engineering factors, people could make gigantic solar panel that reached out into space, allowing for even more energy collecting than solar panels we have tod…

Hey everyone, I hope that I will find the right answer here: attached here an image of front (the upper) view and top (the lower) view of some shape (I am working according to the first angle projection). my question is - what is the method for finding the third view (the side view). is there any general method to solve this kind pf problems? I kow that I should draw a 45 deg line, but from there - how do I know whice points in the known views corresponds to the points in the unknown view? thank you so much! new doc 2018-07-20 00.40.38-20180720004046.pdf

How does it work ? What equipment is on board jetliners to provide enough oxygen for the occupants ? Pressurizing cabins is one thing, but where does the amount of oxygen consumed comes from ? Never seen at ground support equipment, any oxygen filling operation. There may be oxygen cylinders for the masks that drop from overhead on emergencies, but that has to be unrelated.

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This has been asked on a guitar forum. Scenario: Two cases, one is substantially heavier than the other in that the shell is much thicker. The fit for the guitars is close all around and the interior material and structure is identical. Dropped from some arbitrary height with an acoustic guitar inside, which would protect the guitar from shock the best? The difference between the two is the weight; Let's say one is double the weight of the other. Also, would a snug fit protect better than having a little space around the guitar, so that it can move a bit?

Trying to build a machine that does multiple things: GPS, touch screen, computing, microphone, camera, motor control, wireless internet, etc. Any advice? I've heard Raspberry Pi, Arduino, etc. New to this whole thing...

Hi i am 14 years old and need help on a science project for which I need to heat water immediately in a test tube at a temperature as close to 50 degrees centigrade as possible but not more than that and keep the water heated at this temperature only. please advice thanks and regards

I have a 16' wooden beam across the carport...that was 4' short of the opening, so the contractor put another support post to extend the beam. I want to remove post after I sandwich the 4.75" wide beam with two 8' long steel plates. They would be attached by pass through bolts in the center, and wood bolts along the perimeter. Does this appear to be well engineered? Do I need 1/4" steel plate or will 3/16" suffice?

Hi science guru's I'm doing some reaserch on photoactive fabrics that can change there composition when exposed to UV light. I'm in no way smart enough to know what I'm looking for so I was wondering if anyone could direct me. To give an Idea of what I'm looking for allow me to be more specific. I'm looking at fabric which can change from something that can let light throigh to something that can block light out with the transition being the disappearance of UV light turning the fabric solid.If anyone has done reaserch like this or knows where I can start my own reaserch into this there advice and help would be much appreciated.

Hello everyone. I had an idea relating to jet engines. I think the innovation could give a slight edge to fighter aircraft by reducing the number of parts, weight and size of jet engines. I'd like to share it with the military (NATO) first, in case they find it worth of keeping secret, but I don't have any contacts. I tried to contact lockheed and boeing through the email addresses that I found on their web sites, but never got a response. Can someone help out? Otherwise I'll just share the innovation here and everyone will be able to see it.

I have a basic understanding of pressure and flow but nowhere near enough to find the answers I need. I have water flowing at a high rate through a pipe (80L/m) and I want to divert some of this through a heat exchanger (30 L/m) whilst keeping the total flow rate as high as possible. I've included a diagram of roughly what I hope will work but I'm not totally sure how to get rough calculations of the dimensions required. Currently I have a single pipe diameter and a valve between the input and output to the heat exchanger (C and E) to create a pressure differential but this slows the flow and is very sensitive to any slight adjustment. In the diagram below…

Tesla's semi will attract you for sure,one can have a look on it to find performance and operational cost. for more details: Website: removed

Hello I am wondering if anyone can help me understand something. I read a similar thread on here where someone wanted to setup an alternator on the rear wheel of their e-bike. Everyone was very helpful in explaining the energy losses that would result from that setup. I just wanted to piggy back off of that person's question. What if I rigged the alternator to be connected to the pedal drive chain so that I would be charging the battery via the alternator when I manually pedaled. Im sure It wouldn't give a great deal of energy to the battery to the point of a complete recharge but enough to extend the battery range right?

Getting stuff to space is very expensive, about $2 million per ton to LEO (currently). ~$150 million for 63.8t, so ~$2.3 million per tonne on falcon heavy expendable. Capabilities & Services | SpaceX: http://www.spacex.com/about/capabilities Assuming we don't want to wait for BFR or SLS, what CAN be done with Falcon Heavy, lowest budget, fastest kickstart of propellant mining and delivery to LEO? Do we NEED to have people ON the moon or can robots do the job? I haven't seen robots that can do this yet, so is it faster/better to start on a moon base or work on robots, or do both? Are there pieces of infrastructure that can be laid down right away, ma…

Hi everyone, I'm trying to establish the relation F=Force of the head of the conrod=f(C=torque-couple of the motor) in a conrod. I tried to do it myself but apparently, I donnot have the right result because of the way I project my force vectors. I searched for an answer on google, ecosia, etc, but no one except this site (http://www.pats.ch/formulaire/cinematique/cinematique4.aspx) provides a result; but there is no explanation, no proof... …

Overheard a conversation about car tires. One person said that instead of air they just use Nitrogen. Why use nitrogen, what is the difference? Could we therefore fill our car tires with helium to make them lighter, or even .... float? What challenges would a helium filled tire face?

Wikipedia - Florida International University pedestrian bridge collapse The Florida Department of Transport has released the engineering design and construction plans for the FIU pedestrian bridge, which can be downloaded from this link. Florida Department of TRANSPORTATION - Denney Pate signed and sealed FIU bridge construction plans - 2016 & 2017 https://cdn2.fdot.gov/fiu/13-Denney-Pate-signed-and-sealed-FIU-bridge-construction-plans.pdf My analysis of these engineer's plans have revealed that my earlier suspicion that member 11 was dangerously under-reinforced has been confirmed, to such a degree that the collapse of member 11 (and cons…

If you haven't heard, an American Southwest flight, 737 was flying from Newark to Dallas. The plane's left engine (?) blew up/malfunctioned. The pilot (former Navy fighter pilot) was able to land the plane. My question is how was the plane able to stay in the air as long as it did, and descend, turn, and land with only one engine? ~ee

Dear All, I’d like to share an experience with the fall of potential method: if I call E the electrode under measurement (in a square arrangement of approx. 20m), P the inner Potential electrode and C the outer current electrode, I could get a flat curve of the E resistance whilst C was away from E by a distance corresponding roughly to the side of E. I was quite surprised since I thought this distance was too short and I expected a non flat resistance curve since E and C were supposed to couple with each other. Hence a question: can you theoretically get a flat curve when E and C voltage gradients still significantly overlap and, if so, does it necessarily m…