Iron Definition and 517 Threads

When materials with high permeability are used to shield against low EMF frequencies of the order of 10 Hz, is the effectiveness linearly dependent on thickness and permeability? In other words, pure iron (mu=200,000) can be 10 times thinner than mu-metal (mu=20,000) for the same result with a...

Hello friends. I know there a lot of complex mathematic involved in this subject and I'm not currently very knowledgeable in that area but, in simple terms, what would be the simplest way (theoretical or practical) to determine the magnetic saturation of a cylindrical soft iron magnetic core...

I know the basic equations of a solenoid carrying a current, the consequences of having an iron core inside one, and how that derives from Ampere's law. But these suggest that the only figure of merit is the cross section area of an iron core and the solenoid, not their shape. Thinking in more...

Hi. This picture shows an iron ring shielding a static magnetic field: Does this really work, and why? I know that a conductor can shield an electric field (Faraday cage) and a changing magnetic field (Lenz's law), but why would it shield a static field? Especially since iron is a ferromagnet.

Hello friends of the forum! I'm here with a doubt! I have a solenoid of cross-sectional area 5cm and length 9cm with iron core of relative permeability (ur) 9,000, I wonder how to calculate this silenoid!

Homework Statement is cast irion body and face centenerd cube structure? wasnt quiet sure, i thought it was both because it can solidify different temperatures one of them Homework Equations mululpe different cast irons The Attempt at a Solution

I know it's a common question but I've found no answers online so far. My professor has made a point out of saying that fusion reactions after iron and nickel do release energy but just not enough to keep the star from imploding. This didn't make sense to me. How would fission release energy if...

Homework Statement Two blocks of iron, one of mass m at 10.0C and the other of mass 2m at 25.0c, are placed in contact with each other. If no heat is exchanged with the surroundings, which of the following is the final temperature of the two blocks? A)10 B)15 . D) 20C ( this is the answer) The...

Earth also has iron rich deposits, I think generally they are thought to be remains of meteorites. Same is likely for Mars, but there is a lot more iron (and compounds) on the surface of Mars than there is on Earth. Are there substantial amounts of silicate rocks, as Earth has?

Good day, everyone. I'm looking for some iron (Fe) and nickel (Ni) foams for a project I'm working on. Any help to find a vendor with affordable pricing is much appreciated. Thank you.

Hello, The explanation for this, min 0:54 is that you have Fe2O3 in the match head, and after burning it, pure iron is obtained 2 Fe2O3 + 3 C -> 2 Fe + 3 CO2 I think the chemical explanation is fine, but I don't understand why Fe2O3 is added (as colorant, if the red phosphorus is already...

Hi, I am looking for the temperature dependence of the saturation magnetization of Fe. Any help?

Homework Statement A copper wire and an iron wire of equal length l and diameter d are joined, and a potential difference V is applied between the ends of the composite wire. Calculate the potential difference (in volts) across the iron wire. Assume that l = 2.00 m., d = 0.30 mm., and V = 156...

Homework Statement [/B] (a) How are the following properties of Iron affected when carbon is alloyed with it?Illustrate your answer with reference to the microstructures of steel. o Hardness o Strength o Ductility The Attempt at a Solution I've looked at this question a few times and...

Homework Statement We put 1kg iron of temperature 100 Celsius into container with 1kg of ice, temperature 0 Celsius. What is state of the system after reaching equilibrium? Calculate change of entropy. Coefficient of melting of ice (c_L) is 330 kJ/kg, coefficient of heat transfer of iron (c_I)...

I don't understand the difference between cast iron and high carbon steel. They both are an iron-carbon alloy and they both have a high amount of carbon within the iron metal. Both will oxidize at the same rate without a coating to protect the metal. Stainless steel will oxidize, it just takes...

What is happening within an iron bar/iron core when it is wrapped by a solenoid with current running through the solenoid? Do electrons within the bar get displaced?

Theory explains magnetism in iron as a combined effect of magnetic moments of electrons. Now, what is confusing me is that valence electrons in iron are supposed to be free. The valence band and conduction band overlap. So, what kind of orbital and spin-ular momentum do these free electrons...

For physical experiment I have a project in which I have to measure the speed of sound in the air. 1. If I take an iron tube (inside is air) and a speaker, 2. put the speaker at the beginning of a tube, 3. speaker is connected to frequency generator (with which I can change frequencies)...

Having a cylindrical iron container with wall thickness of 20 cm, and a total weight of 500 tons when filled with its cargo, how would you be able to calculate its required voltage and current input in a vertical railgun system (relative to the Moon's surface), with an exit acceleration of...

Why does an iron core increase magnetism? Apologies if this more advanced than high school. EDIT: Disregard, found article on magnetic reluctance.

The situation has always confused me since primary school. There are elements/metals which are in the form of physical sizes which we can see and touch such as gold, iron, argent etc. How can these metals pass into water or human body? This is very confusing for me. I have heard that there are...

I came across this MCQ in my book, it says: Iron deficiency anemia... i) is of hypochromic, macrocytic type. ii) is commonly associated with chronic blood loss. iii) is common cause of anemia in infants below 1 year. iv) may increase the number of megaloblasts. v) is more common in males. I...

Hi, Just wondering if I'm going about solving this problem correctly: "A block of iron quickly sinks in water, but ships constructed of iron float. A solid cube of iron 1.6 m on each side is made into sheets. From these sheets, to make a hollow cube that will not sink, what should the minimum...

About 10 days ago, I read this in the Nature journal: http://www.nature.com/news/colliding-stars-spark-rush-to-solve-cosmic-mysteries-1.22829?WT.ec_id=NEWSDAILY-20171016 I quote: "Over the past decade or so, astrophysicists had come to believe that this was the most plausible mechanism to...

I assume most people know what I'm talking about. I've done some mild googling regarding hologram technology, but currently technology isn't nearly as robust as what Stark has in the movies, and I'm not so interested in that aspect anyways. How would you set up a room so that you can interact...

So I was curious about something. Having a flat tire today and having to change my tire made me wonder. I understand torque and force are 2 different things though related they have separate meanings. So my question is if I have a 2 foot tire iron and I am torquing my nuts. Let's say they...

Homework Statement Homework Equations I'm not sure. The Attempt at a Solution I tried to solve this as you would with electric charges. I added up the temperatures and then divided by 2, to get (C) 17.5 degrees Celsius. The answer key gives the answer as (D) 20.0 degrees Celsius. I'm not...

I am very new to electronics and only use it as a hobby. My father bought the soldering iron, but never used it. Manufactured in East Germany (DDR). It came with some kind of a "dark cream" and a white thingy - I do not know what are those for. I have started to look at videos on Youtube "how to...

I'm curious about something. And most of you are probably going to click away as soon as I say, or type this, I guess. But for those of who haven't, thanks. In the Iron Man comics, movies and tv shows the arc reactor keeps Tony Stark from lethal heart damage and keeps the Iron Man Armour...

Lets suppose for a stroy, that a time traveller arrive in a civilization that hasnt reached iron age yet. He isn't a well qualified engineer or doctor, but he becomes a king. How much he could help their development by simply telling : with really hot fire, you could produce iron, not just shape...

How does Iron Man flight propulsion work? It seems to be pure electrical, there are no jet fuels involved. What devices presently being contemplated by NASA that can produce propulsion purely on electricity that doesn't rely on fuels?

I'm trying to talk science to anthropologists and hope an academic physicist will let me quote him. Here is the data and my purpose is to prove that wood can't slice a skull the way a sword does . good grief ... " On this basis, the boomerang is the most probable candidate for the main trauma...

There is something that I am not understanding about the visible colors of coordination complexes. I did a lab where I prepared [Fe(NH2trz)3]Br2 from FeBr2. Fe(NH2trz)3 was a violet color and FeBr2 was red. My understanding of colors in coordination complexes is that reds are high energy...

I am creating a product that incorporates magnetic sensing of magnetic nanoparticles. However due to their cost, I have decided to search for other avenues of testing. My question is about whether Iron Powder will retain a magnetic field once magnetized. I basically will place some iron powder...

Hello, Let's assume we put a small iron particle in a magnetic field. What is the equation of the route that the particle performs? Is it the minimal route length that is possible? (the magnet is a stick-form)

Hello, I have problem. I'm haveing my soldering iron tips oxidize very fast. I need to know what wattage to use to get melting point of solder. I think I'm overheating my tips. The melting point of the solder I have is 221C (430F). Is there a formula to calculate temperature from wattage input...

I dissolved zinc in HCl until it stopped fizzing - all the Zn is gone so there may be some HCl left. I have a purple/violet liquid that I assume is zinc chloride. When I brush newly cut mild steel or iron with the solution, I get copper/brass coloured plating that does not rub off. I have no...

From, http://www.bbc.com/news/science-environment-38372342 "Scientists say they have identified a remarkable new feature in Earth’s molten outer core. They describe it as a kind of "jet stream" - a fast-flowing river of liquid iron that is surging westwards under Alaska and Siberia. The...

Hello Forum, I know that a block of iron would sink in water no matter its shape, unless we shape it like a boat in which case it will float. What if we turn that iron boat upside down? Will it still float? I don't think so since the concave area of the boat will slowly fill with water (which...

Hello, I 'm trying to perform alloy of FeCr (Iron-Chrom) with calculate self diffusion iron depend with chromium composition. My work result that chromium doesn't give linier function with self diffusion iron in the alloy of FeCr. Maybe, anyone can tell me what's happened with my work. I'm so...

< Mentor Note -- thread moved to HH from the technical engineering forums, so no HH Template is shown > Hi! We are looking for alternative ways to heat up flat iron without using electricty or fuel or solar panel. So we came up with friction (as it is also a source of heat). But we don't know...

Hi all, I am recently calculating the iron loss in a permanent magnet synchronous machine with a speed of 24000 rpm (electrical frequency 800 Hz). However, the iron loss data from the data sheet is not sufficient since only frequency of 50 Hz, 100 Hz, 200 Hz, 400 Hz, 1000 Hz and 2500 Hz are...

Hello, if I had salt water and put microscopic spheres with iron spikes in (a lot of them, say 1,000). Then if a high static charge was applied to the water (say 500,000 volts), what would happen? My intuition tells me that the electric field would concentrate on the tips of the spikes, making...

When I added a zinc plated iron ball into the acetone-peroxide solution, they zinc started bubbling. The solution turned whitish. Then after leaving overnight it became grayish with orange red foam on top

I'm currently in conceptual phase of designing a coil gun. Thinking back to my physics 2 class-- and some of my independent studies-- I understand an EMF produced by a solenoid with current through the wires of it is strengthened significantly by a ferrous core, as seen by the classic experiment...

Homework Statement When iron is irradiated with neutrons an isotope of iron is formed. This isotope is radioactive with a half-value period (half-life) of 45 days. Give the meanings of the terms printed in italics. A steel piston ring of mass 16 g was irradiated with neutrons until its...

Old time home garden cure for, mold, mildew, fungi, blight, on tomatoes, squash, and other plants is rusty water. I put some kitchen food cans in a fire to remove glue and varnish, they have been in a bucket of water for a week still no rusty water yet. I need some rust what is a quick way to...

I need help in calculating the magnetic field outside of an iron core solenoid at different distances. I have made an electromagnet by taking a 99.99% pure iron (5cm in length and 1 mm in radius) and wrapping wire over it. I have measured it's magnetic field at the end and cannot find an...

This seems simple but i cannot find an answer anywhere. First off: is iron attracted to a magnet because the field strength on the side of the iron object closest to the magnet is stronger than the one furthest? And if this is true, how can one use this "differential" magnetic field to calculate...