1 Answer1. Active Oldest Votes. 3. Sparks are tiny pieces of material that are hot enough to produce visible light. With fire, it is tiny particles of burning wood. In welding, it is the superheated welding material. When smithing, it is tiny chunks of the hot metal. For flint and steel or any other hard object scraping cold metal, it's the tiny flecks of metal rapidly oxidizing and heating up. Dec 19, · Sparks in hard vacuum are triggered by field emission (at much higher field strengths) and stray gas, and are mostly composed of metal sputtered out from the surface. Further heating of the metal causes it to vaporize, melt and fragment further, enhancing the discharge and often producing sparks. Duration of discharge makes some difference.
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I was wondering what are sparks, or of what are they made of? I read in this wiki article that they are simply some incandescent particle, so, does that mean that any small mass of material, heated to a temperature that makes it shine emitting visible light counts as a "spark"? Of course, spark is not a precise mathematically definable concept, I'm mostly wondering what are sparks made of in the following circumstances:.
Sparks are tiny pieces of material that are hot enough to produce visible light. With fire, it is tiny particles of burning wood. In welding, it is the superheated welding material. When smithing, it is tiny chunks of the hot metal.
For flint and steel or any other hard object scraping cold metal, it's the tiny flecks of metal rapidly oxidizing and heating up. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Learn more. What are sparks as in fire sparks made of? Ask Question. Asked 4 years, 5 months ago. Active 3 years, 1 month ago. Viewed 3k times. Of course, spark is not a precise mathematically definable concept, I'm mostly wondering what are sparks made of in the following circumstances: -Fire sparks -Welding sparks -Hammering metal. Improve this question. Santropedro Santropedro 1, 1 1 gold badge 11 11 silver badges 21 21 bronze badges.
Nice answer here about this here physics. Add a comment. Active Oldest Votes. Improve this answer. Johnathan Gross Johnathan Gross 1, 8 8 silver badges 18 18 bronze badges.
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Dec 13, · Where Are Sparks Being Made? The Spark is one of the few Chevrolet models made solely overseas. Presently, the Spark is manufactured in Changwon, South Korea, by GM’s subsidiary GM Korea. Are Sparks for the U.S. Market Produced in the U.S.? Sparks sold on the US market all originate from the GM Changwon Plant in South Korea. The combustible coating contains these components, one or more of each category: Metallic fuel, mandatory to make sparks; size of particles influences appearance of the sparks. Aluminium or magnesium or magnalium, producing white sparks. Iron, producing orange branching sparks. Titanium, producing rich white sparks. President Obama promised to bring the troops home and in December of , after almost nine years of occupation he made good on that promise, beginning the withdrawal. However, he did intend to leave a small number of troops in place, but the Iraqi government " refused to grant American troops immunity from prosecution under local laws," so he.
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Read times. I was watching frame by frame video of different types of sparks and realized electrical sparks last far too long to just be hot plasma or gas. When you see sparks come off things what are you seeing?
Is it little balls of metal or is it more like miniature ball lightning? Also these sparks seem to radiate out rather then jump across like a classic electrical arc. What makes their color black body radiation or electron spectral lines? Do they leave small amounts of dust behind? If so they look big to our eyes but how big and hot are they? Max characters: ; characters remaining: Images in your signature must be no greater than x25 pixels.
They are hot vaporized material. They may travel in curved paths because of strong magnetic fields which is very apparent when using a spot welder. There are different type of sparks in electronics, depending on conditions.
They are different at high current, higher voltage meaning like 20V , when making contact, or when opening a contact. The discharge itself is ionized gas, with some metal at the contact points vaporized into it.
Sparks in hard vacuum are triggered by field emission at much higher field strengths and stray gas, and are mostly composed of metal sputtered out from the surface. Further heating of the metal causes it to vaporize, melt and fragment further, enhancing the discharge and often producing sparks.
Duration of discharge makes some difference. A very brief spark often a static discharge runs out of current before much material is able to vaporize, and the spark moves very little in that time.
So you get a wirey looking spark, and the color is mostly blue or purple, corresponding to ionization of oxygen and nitrogen. Repetitive pulsed discharges a lot of Tesla coils may be visibly composed of this kind of discharge, either with branching appearance the prior spark provides a still-slightly-ionized channel that is reignited on the next spark, and more sparks branch out from it or streaking as the same path is taken on each pulse, but convection moves the path through the air.
Often you can see the choppy streaking, other times it just looks smeared over. Sustained discharges arcs glow with heat as surrounding air is heated and ionized, and as more electrode material is eroded and ionized, hence coloring the arc. Sodium yellow being a huge component, because sodium ions are so bright even when present in trace amounts. Actually sodium is pretty much everywhere, not even in trace amounts, but more like ppb to ppm.
Salt is in your sweat and finger oils, if nothing else. Bringing a project to life? Send me a message! The material the contacts are made of plus a little bit of nitrogen and an even smaller amount of oxygen. Should you find yourself in a chronically leaking boat, energy devoted to changing vessels is likely to be more productive than energy devoted to patching leaks.
Warren Buffett. Quote from: Beamin on December 18, , pm. Collecting old scopes, logic analyzers, and unfinished projects. The different effects can be quite sensitive to exact conditions.
One arc I generated in my way under regulated youth generated a spectacular spray of material that left very fine ash? I was never able to duplicate that effect in many many trials.
Details of the setup will be closely held to protect the lives and property of others. This could be a result of an electrical arc, whether intentional welding or otherwise kapow! The cause of the color depends on if they are simply very hot black body emission, or as close as a real material gets or burning chemical reactions as in fireworks , or both.
Note that things that start off as simply very hot tend to quickly transition to burning in an oxygenated atmosphere. For example welding is generally done under some sort of shield, either flux or inert gas, but when a bit of molten metal flies off out of that controlled environment it quickly starts oxidizing. Whether you'd get enough oxidation on something like a bit of molten copper flying though the air to get a visibly colored spark versus just the black body emission, I'm not sure.
They're formed from sheer excitement. Quote from: T3sl4co1l on December 19, , am. This is a very complicated subject and depending on so many factors of how the spark was generated. If it is a high voltage spark, there are usually 3 phases: - breakdown discharge nano second range - arc discharge micro second range - glow discharge milli second range Depending on material for electrodes and surrounding gases, it can vary a lot of what the sparks are made out of.
I have created 10 mm long sparks in air with about A discharge current in the nano second range only and it looks very hot, bright and is loud but there is almost no erosion on the electrodes. There are 3 kinds of people in this world, those who can count and those who can not. Pages: [ 1 ] Go Up.
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