Iron Definition and 517 Threads

There is a 0.8m long, 1.2 iron bar with a string attached to the center, making a 35 degree angle (from the bar). Calculate the torque produced by the tension in the string. A pivot at one end holds the bar, and the string is attached at the bar's center, which is the center of mass. I'm...

Please Help! I have no idea where to start with this one! A 100.0mL sample of water was treated to convert any iron present to ferrous ion. Addition of 25mL of 0.002107M potassium dichromate converted the iron to ferric ion and the dichromate to Cr3+. Excess dichromate was then back...

Does anyone know how does this molecule looks like? (I study Aerospace, don't ask me why do i want to know :cry: ) How does those atomos connect with each other: It's chemical formulae is: Nd_2Fe_1_4B

Plz help ASAP! Iron has a mass of 7.87g/cm^3 of volume, and the mass of an iron atom is 9.27x10^(-26)kg. If the atoms are spherical and tightly packed, a) a) what is the volume of an iron atom? --> this one I do know how to do it, the answer is 1.18x10^29 m^3 b) what is the distance between...

For most of you experts out there, this should be fairly simple to answer. Well, technically, all it takes is logic to answer this: A block of Iron has a temperature of 10 degrees celsius. There is a second block of iron, identicle to the first, that is 2x the temperature of the first block...

Iron has a property such that a 1.00m^3 volume has a mass of 7.86 X 10^3kg(density equals 7.86 X 10^3kg/m^3). You want to manufacture iron into cubes and spheres. 1.) Find the length of the side of a cube of iron that has a mass of 480 g. 2.) Find the radius of a solid sphere of iron...

Hi everyone, I'm not sure what would happen in the following reaction (it has something to do with the rusting of iron): Fe (s) + KMnO4 (aq) ----> ? KMnO4 is potassium permanganate and I know it is a very strong oxidizer. So I am assuming one of the products may be Fe2O3, which is...

I am currently reading "In Search of Schrodenger's Cat" by John Gribbon. In the book he refers to iron as the most desirable form of matter and that all the matter in the universe "wants" to become iron. I think I recall a professor describing the collapse of a star under gravity and the...

Evryone knows that the work done by a magnetic field is zero. Then how does a permanent magnet lift iron filings.

We all know that the work done by the magetic field is zero. But, how does the magnetic field lift iron objects?

"The Iron Dragon" and a day of time travel. Last weekend Tsunami and I met my parents for a very unusual weekend that begins in the hidden mountain town of McCloud; right next to the majestic, silently sleeping, snow covered volcano called Mount Shasta, in Northern California. The day begins at...

Has anyone seen the hypothesis of http://web.umr.edu/~om/ regarding the possibility our sun is the result of a re-accretion on a supernova remnant? I looked but haven't seen anything on it in the forum, and was wondering what you'all think if it? :confused:

Now for another question on the same subject You all know how in the human body the oxygen binds to the iron compound inside the hemoglobin. and that carbon monoxide has a 200 to 1 affinity to oxygen within the hemoglobin. But anyway my question is if The Iron inside a cell pulls and holds on...

http://www.biomedcentral.com/news/20040226/01

I am considering getting into forging metal things at home as a hobby. Setting up a little smithy in the back. I thought I'd try making some blades and such. What are the properties of iron/steel as it cools? At what rate should it be cooled for different hardness or durability? What...

[SOLVED] Iron Fusion In Stars If iron is said to be the last stage of fusion in stars, how is it that heavier elements are found on earth, where there seems to be less likely a chance for such fusion to occur? Where do these elements come from? Moreover, the half-life of a heavy element on...

Was going to put this up a couple of days ago but was a bit preoccupied. So here goes. Imagine that you take a single crystal of Iron, a whisker, and bend it around to make a circle. How could you find out if the crystal was magnetized? Remember, all the magnetic field is contained inside the...