Engineering

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.

Hi, I have a Garmin Instinct watch. When I press one of the buttons I come to a place where I can choose to set alarm, timer, stop watch etc. It will remember what I did last and show that when I get to the that place again. For example, if I use the alarm, the alarm will be displayed first. How does the watch save this even when it's turned off? It can't stay in RAM if the watch is turned off right?

Hello, I was able to build a machine to reduce torque with high ratios up to 1:700 gear box. What applications in mechanical engineering I could use my new invention in? Thanks,

I received an email from a man who uses a unique message in his signature. It is in the form of a math equation. To the left of the equal sign is SW. I did some brief checking online and did not find an equation using SW. I don't want to publish the entire equation so that someone else solves the message before me. Any help would be appreciated. Possible clues: 1. he is a "petrophysical advisor" who works with an engineering firm 2. the equation is next to a picture of an oil derrick If you have an idea what the equation might be used for but need an extra hint, I will provide more information. Thank you.

Hi, I know how LCDs and OLEDs works. LCDs uses a backlight and liquid crystals to control how much light is passed through the color filters. In OLEDs all pixels lights up by them selfe. Now, I wonder a few things: 1. Why can't LCDs be completely dark? I know that the backlight is on all the time, but the polarizers can align so that no light can come through? 2. Why does OLEDs have better contrast? Is it because it can get completely dark? LCDs can still get brighter. 3. Why does OLEDs have better viewing angle than LCDs?

If I have a 15cm diameter by 3 metre high water tank with a non-return one way valve at the bottom attached to a water pump, what size and power of electric pump would I need to pump water to fill the tank? Thanks

Hi. Seems like traffic lights could greatly benefit from artificial intelligence technology AI to save brutal amounts of fuel and time. What uncommon sensors would be needed for implementing such ?

How they were able to create an illusion of a black/dark colors in this 3D laser whale image? Don't black/dark colors assume an areas of light absorption?

Do we have any chart to help us sizing the suction and discharge pipe diameter when flow mass and velocity range is known?

Greetings to all HF enthusiasts! This shall be a frequency multiplier, but beware I haven't tested it (and won't in a foreseeable future). It will multiply, but whether it improves over existing diagrams remains to be seen. This diagram is to harvest an odd harmonic; connect the collectors together at one end of the coil to harvest an even harmonic. A balanced mixer could be built similar to the multiplier, with the LO input between the input secondary's middle point and the ground; adding two PNP would make a doubly-balanced mixer. I doubt such a mixer has advantages over a diode bridge. ----- Unusually, the multiplier has bipolars in common base…

It's a theory that hard-wood blades are able to excise cortical plate in skull-bone . My inquiry is about the ultimate failure of 2mm thick wood blade at maximum human arm-speed of 40metre/sec ( assumed to be accelerating). As surgical chisels need an upper limit of 2mm to avoid random bone cracking and damage, then 2mm wood is given to obtain a smooth surface to the skull-trauma fracture. A .2cm slice of wood of .1kg at 40m⋅s2 strikes on 5cm of bone (1 cm 2) = 16MPa. . Wood density ~ 1ton cu.m. The wood is impacted perpendicular to 2mm 'sharp' edge. Parallel ultimate failure is 40-70MPa and by analogy the perpendicular fail is ~8 - 14MPa for hardwood…

For a long time now this question has bothered me. I have a classic car, and I want to know how the rate of flow of coolant affects cooling. Could I make a simplified model to show how engine temperature varies with coolant flow? Obviously zero flow would halt the cooling effect. But does engine temp continue to reduce with increase in flow or is there a point where it stabilises or even drops? As an electrical engineer I dont have the tools to make such a model.

If electricity likes to shoot out of pointed things or the sharp edges of things, then what shape or geometrical figure does it like to go into?

im curios about engine piston sizes and why it is done. i have 2 vehicles. 1 is a toyata landcruiser 4.2 diesel strait 6. its about 25 yrs old. i have recently bought a new isuzu truck with a 5.2 liter 4 cyl. something i wonder is why are the truck makers seeming to go for larger pistons than 20 years ago. so why do isuzu have a 4 cyl motor when a 5.2 liter could easily be a 6 cyl.

Hi. New to the forum. I need to run a little motor out of a printer. I found a line in a laptop charger is 16v, lowest one. Other line is 32v. Anyway, the 16 will run the little motor just fine. I need to control that speed. It's either on high or off. Potentiomeeter, or rheostat? Please explain the choice. Thank you. I'm trying to get some quick education on this.