Iron Definition and 517 Threads

I'm looking at fe ionisation. Wherever I look I get similar values. Probably because everybody just keeps reusing published values... I think the value for the 24 th level is incorrect but I'm not sure how to validate this. The published value is 195200 but I think it should be more like...

Hi All, It is said that iron has a high "permeability" for the magnetic field, it let's the magnetic field pass through it more easily. But it is also said that iron screens the magnetic field? Don't these two contradict themselves? Thanks, Ionel

Hi, I am a high school physics student and the only ways we learned to calculate the magnitude of a magnetic force involved a moving charge or current in a wire. As a result I have wondered how a bar magnetic magnet may exert a force on a piece of iron, since there is no clear movement of charge...

In a laboratory experiment I have tested plain carbon steel in a beaker of bleach (sodium hypochlorite), immersed for a week. The result is a magenta-coloured solution with a large amount of ferrous hydroxide deposits. Q1) I haven't been able to find anywhere anything that might be causing...

Hi everyone, I have lots of (potentially dumb) questions about this "project" I'm working on. It's a voice coil actuator, but with things a bit reversed. Here's how a regular voice-coil actuator is constructed: The rod that is inside the coil is a magnet and the outer cylinder continues the...

Homework Statement What electron current is driven through a 1.4-mm-diameter iron wire by a 0.070 V/m electric field? The mean time between collisions in iron is 5.2×10^−15s . A=1.5*10^-6 m^2 ne=8.5*10^28 m^-3 Homework Equations I know I need to use ie = neAVd, but I'm having trouble finding...

Homework Statement calculate the flow rate at which oil (kinematic viscocity = (10^-6) (m^2) /s ) flow thru a cast iron pipe 100mm diameter and 115 m long under head difference of 5m Homework EquationsThe Attempt at a Solution hf = 32μLV / ρg(D^2) how to get the value of μ( dynamic viscosity)...

What happens when you apply power to a toroidal solenoid with a iron ring inside? Does the ring move? Does the speed of movement depend on the amount of power? Sorry if this is too easy, I have no education in physic.

This film is very good! almost all soundtracks too!

I am designing 3ph distribution transformer. So for calculations regarding to design, I want specific iron loss. I know how to find out iron loss but that requires initially specific iron loss of material, which i don't know how to calculate. I also searched it on google and in some books but...

I decided to simulate this scene in Lord of the Rings for a project in school with the purpose of calculating the "real" mass of the One Ring. I've done the experiments according to this principle sketch but I have some troubles with calculating the magnetic force that the copper coil is...

Homework Statement In a solenoid with 12 enamels for cm passes the current 2 A. Find the magnetic permeability of the iron bar inside it.(B0=1.508 T) Homework Equations B=μ0*I*N/l(length) The Attempt at a Solution We have N/l(length)=1200 enamels/meter B=4*10^-7*3.14*25*1200=0.003T Now...

A really basic question: since room temperature (300K) is much lower than the Curie point of iron (1043K), the spins in an iron bar at room temperature should be lined up even when the external magnetic field B=0 Then why can't we use any iron bar as magnet? Instead we have to rub the iron bar...

I have read that ferrous sulfate has 65mg of elemental iron per 325 mg tablet. Then I read that dried ferrous sulfate has 50 mg per 160 mg tablet. Does this mean that the wet ferrous sulfate has water with it? It seems that the dried version matches the percentages based on the chemical formula.

Homework Statement The question tells me that all dissolved iron species will have an activity of 0.1M. So is Fe(OH)42- considered a dissolved species of Fe, and if so, it will have an activity of 0.1M? Homework Equations N/A The Attempt at a Solution I want to say that it is not considered...

Hi guys, I've lurked the forums for a while and read various other iron oxide production threads But I have a few questions nobody ever brought up that I could see Typing this up on my phone, so forgive me if autocorrect and punctuation is wacky I plan on producing a larger amount of iron...

Hello, and thanks for looking at my question. For starters, this is NOT a homework question, or a question I will receive any credit for except maybe a "hey, cool". The level of difficulty is roughly a junior-year Electromagnetics class homework quesiton, I suppose? My Question is rather...

if I throw a ball of iron on the ocean, the velocity in which it will sink will be lower at the beginning and higher getting near the deepest part of it? As it may be forced by the pressure of water? (the weight of water)

The question asks: Recall that you observed very little corrosion occurring on the iron nail immersed in NaOH(aq) solution. This observation is difficult to explain from an electrochemistry perspective since electrochemistry principles predict a spontaneous reaction that should cause...

hey folks, so here's the deal, I have a isolation transformer that I use for my self wound irons.one of them is working good , heats up nicely and i solder with it all the time, the other one is an old iron , its bigger i want to use it were bigger parts need to be soldered. heres the problem...

Good morning, I have an iron bar (35 cm long) hinged on an axis. The path of this bar is limited to 45 degrees. I have to measure the angular velocity of the bar when it rotates 45 degrees. I need to get a graph of variation of the angular velocity along the 45 degree paths. The time taken to...

Homework Statement Iron core solenoid, with 50 turns per cm (5000 per metre) Current = 0.2A Measured B field = 1.58T Calculate: i) The applied field, Bapplied ii) The magnitude of magnetisation, M, of iron alloy Homework Equations For a long solenoid, Bapplied=μ0nI And, generally...

Hi , I, Arnendu, want a really big fan of Iron Man and Physics. I have a question . We all know iron man get his suit's power from The Arc Reactor. So, I think why scientists can't make it properly, the science behind it and its usefulness. So, I request you all to send your reply...

It is commons practice to dump mine tailings in an area near a mine. In areas where it rains, water may accumulate behind burms and the tailings which form an earthen dam. In valleys, lakes can form behind dams leading to potential failures...

Heat seems like the easy answer, but interparticle collisions should decrease as the ball slows.

Hello, So I am working on a project that requires the movement of iron nanoparticles (let's assume 25nm in diameter, and let's assume the sphere is uniform and pure iron) through a (non-magnetic) gel using an externally applied magnetic field. Let's assume the total distance I want to move the...

Homework Statement A boll of iron with the volume ##V=\frac{4 \pi 0.01^3}{3}## heats up to 1073 K in a chamber with vacuum, how long will it take until the iron is at 1063 K? The given data is this: ##\rho_{iron} = 7870 kg/m^3## specific heat.. ##c_i = 0.5 \cdot 10^3 J/(kg \cdot K)##Homework...

Dear PF Forum, I have no background in physics :frown: In http://math.ucr.edu/home/baez/end.html 1. If an Earth size object is left alone (assuming the Sun won't swallow it 2 billions year later). In 101500all of it atoms, oxygen (majority abundant in earth, right), silicon, nitrogen (abundant...

Respected all my bros,, I want to creat force of 3000 joul to push the iron ball of 100 gm? The ball should go straight upto 10 meters at speed of 700 miles per sec.

As far as i understand the thing that matter in all of the process of mutual inductance is the rate of change of the current in the primary coil $$\frac{dI}{dt}$$ butting soft iron core will increase the density of the magnetic field inside the primary coil, but how this will effect...

In modern nanotechnologies, metals can be vapourized to coat onto the surface of another material as a thin but hard protective layer. How much energy would it take to heat 0.55 kg of iron from 1400oC to vapour at 2050oC?

The 300 series of stainless steel is austenitic meaning that the iron in the steel is gamma iron. This means that if it is magnetic it is only the weak magnetism from the nickel. I read the wikipedia article on allotropes of iron and it says that gamma iron occurs when the iron is heated to...

Hi, I tried to calculate the distance resulting from Na iron atoms contained in 1 g. scaled in meters and by juxtaposing them in a single thread (segment). I did the following calculation with: Atomic radius : 140 E-10 meters Na : 6 E23 atoms in 56 g. of iron => ( 2 x 140 E-10 x 6 E23 )/56...

Dear PF Forum, In previous thread, I am asking about fusion power. But there is one thing that intriguing me. This is one of the reactions that produces tritium. n + _3^6Li -> _2^4He + _1^3H + 4.8 Mev What is this reaction called? 1. Fusion? If yes, why it's called fusion? 2. Fission? 3. Other...

Hello everyone, I'm not sure if the title makes sense, but I'll try to explain it a bit better here. So, if we have a transformer with an open iron core (U shaped iron core, with coils wrapped around each side, same number of coils, same thickness), why is the electromagnetically induced emf in...

Homework Statement An iron casting weighs 300 N in air and 200 N in water. What is the volume of cavities in the casting, if the density of iron is 7800 kg/m3 ? Homework Equations d = m/V Fg = mg The Attempt at a Solution I was not sure in the slightest of how to solve this problem. So I...

Like attachment above When heat source give heat until 1000degree celcius Copper at center of cylinder iron Copper will hotter and iron will colder because ambient air Chamber is vaccum So there are different temperature between copper and iron How voltage will produce according to...

Homework Statement When the supply of oxygen is limited, iron metal reacts with oxygen to produce a mixture of FeO and Fe2O3. In a certain experiment, 20.00 g iron metal was reacted with 11.20 g oxygen gas. After the experiment, the iron was totally consumed, and 3.24 g oxygen gas remained...

Hi, I am planning to conduct an experiment using electromagnet but I could not find the soft iron core. My school lab doesn't have it, and I tried asking around in shops which sell electrical appliances and shops which sell science apparatus but nobody seems to sell it. Does anyone know where...

i want to build an electromagnet which can attract small iron pieces(2-3 mm long) at a distance of 10 cm from the magnet.I am using 24 awg. magnet wire.Please help .answer these questions - 1) How long magnet wire (24 awg) do i need? 2)How much current 3) what shud be least radius of solenoid 4)...

Wikipedia only talks about helium and carbon-oxygen white dwarfs... I understand that on a red giant you only get fusion up to oxygen, but I though that maybe if you had a red supergiant which produced iron in its core, and when it exploded as a supernova it threw off enough mass to form a white...

Homework Statement Attached. Homework Equations The Attempt at a Solution For the first part I determined the net magnetic dipole moment of the disc by calculating the number of moles the iron the disc comprises of and hence the number of atoms. Then, by making the assumption that 30%...

So I am starting to learn for the final exam a bit early and I am trying to do this problem with a uniform beam which is reinforced with iron inside. I know how to calculate this if it wasn't for the reinforcement within the concrete. I know that the purpose of the iron reinforcement is to...

Hi! I am modelling heat transfer through the oxide scales on the surface of steel but I cannot find the accurate properties of oxide scales. I need thermal conductivity, density and specific heat capacity. They shloud be dependent on temperature. I have found only one book in which are some...

I'm assuming the reason raw clay is red is because of the iron content, how do you separate it. also is that why bricks are red? and is porcelain just pure clay? one more thing do smelters of iron (how?) also produce steel at their factorys, and if so is that steel also sold as ingots for...

I have 2 related questions about Earth-like planets and solar systems: First question: - I don’t understand why the Earth has so much iron. - How much iron is blown off by the typical supernova in proportion to other metals? - If the proto-solarsystem was a rotating gaseous disk, should most...

If you were starting with no applicable background, no engineering degree, nothing except for a lot of free time and a moderate amount of money to spend, how would you become Tony Stark? No limits on time, whether it's 6 months or 60 years, how would you go from Joe the VCR clock programmer to...

Hello, I am calculating the potential energy surface of an iron slab, once with a ferro magnetic behavior and later anti ferromagnetic behavior, I know for ferromagnetic I multiply the number of atoms by its magnetic moment (I use 3 that must be a little higher than its real value), my...

Homework Statement Iron ball Mass = 0.8 kg, Cp=484, Ti=80 Celsius edit : Cp = 448 Aluminum Bucket = 0.5 kg, Cp=900, Ti=20 Celsius Water = 0.6 kg, Cp=4186, Ti=20 Celsius Ice cube=0.5 Kg, Cp=2090, Lf=3.33e5, Ti=-5 Celsius Find the final temperature of the bucket. Homework Equations Delta Q = 0...

OK, so back in the day, blast furnaces were used to refine the iron ore? Iron ore concentrate is mechanically and magnetically refined ore ? Refining usually happens at mines, or somewhere around there. Ore concentrate goes to blast furnace and then you get pig iron. Why not steel? I don't...