Core Definition and 469 Threads

I would like to know what is the function of soft iron core? Is there a difference in function when inserting soft iron core in inductor , motor , generator ? Thank you

I realize that soft iron is the most common material for this but I am wondering if there is something that will increase the magnetic strength. Here is what I have. Two electromagnetic coils in series connected by a yoke with a capacitor in parallel (for spark reduction). Cores are soft...

Wondering if anyone can give me a clue as to where I might look for information on what the best core material would be for an electromagnet if price were not an issue. I need as much magnetic strength as possible for between 3-9 volts DC. At between 80-160Hz. Basically this is a solenoid...

Hello all, I was wondering if anyone could help me figure out some differences between all the different types of processors out there for computers. I am a graduate student learning about CFD, and my advisor wanted me to check out some different processors because we would like to get new...

From http://www.nineplanets.org/uranus.html" : "Uranus is composed primarily of rock and various ices, with only about 15% hydrogen and a little helium (in contrast to Jupiter and Saturn which are mostly hydrogen). Uranus (and Neptune) are in many ways similar to the cores of Jupiter and...

How do we know the composition of the Earth's core? In addition, what is the current model for the generation of Earth's magnetic field? I'm curious to find out.

Does the core of the Earth belong to the Earth or did it come from outer space and collide with the Earth.In this scenario the volume of the moon added to the volume of the continental rocks should equal the volume of the core ( the collision would have displaced material from inside the...

Why does the Earth have a core and can a planet exist without one?

A Wikipedia article says: "The surface of the inner core exhibits rapid variations in properties at scales at least as small as 1 km. This is puzzling, since lateral temperature variations along the inner core boundary are known to be extremely small (this conclusion is confidently constrained...

I tried searching but I must've done something wrong, so... How do we determine what material is at the core of a planet? Do certain metals emit something we can detect? I really don't know how to phrase this in an intelligent way, so please bear with me. :biggrin:

Ferrite silcon (FeSi) core pros? & cons? I'm hoping for some input here to brainstorm. My unlearned theory is that a plyable substraight, in this case a cylinder, will allow the magnetic domains to come off of its' alignment when influenced to do so by an external force/field. The external...

please help me in understanding the following scenarios: 1. how could one approach first criticality in practice? 2. what would happen if we start-up with full power conditions from first criticality? 3. what would the shutdown requirement be in comparison to an equilibrium core? thank...

I need to find the integral of (x^2) 2 (secx)^2 tanx dx said aloud: x squared times by two times by sec squared x times by tan x I tried to use the [tex] function but failed misserably, hope you understand what i mean from what I've written above.

Hello All, I am trying to come up with the simplest (but most effective way to make a core (cylinder that is 5"OD x 3"ID x 2" tall) and I want to make it so that is has two separators on it so I can wind three separate coils on the same core. In case that was extremely confusing, I made a...

So what's the difference between these two technologies? seems to me they're almost the same, no?

If the Earth's core lost its heat, what would the temperature at the Earth's surface be? In other words: how much of our heat comes from the Sun, and how much from below? Assuming we had some other way to generate a magnetic field and the core burnt out, would we be able to survive?

Hello all, I'm running a stochastic simulator for chemical rate equations and I'd like to know how to specifically impelement a dual core solution on my AMD athlon 64 X2 4200+ processors. When I run the task manager with the simulator running, it is apparent that both cpus are running...

I've begun a study of the sun's interior and Emden's equation. Yet nowhere on the web does anyone divulge how to calculate the core radius or the inner core variables. One thing I did was to suppose a homologous polytropic core ( n = 3 ) with: epsilon = energy generation rate mean epsilon = L...

Amazing, after downloading my first thing with Bittorrent, this program is not working on my computer anymore. I obtain the error msg: Initialization Core Failed. I tried to re-install the program several times, even doing a restoring of my system, but nothing works. Any ideas? Thanks

Hi everybody, didn't really know where to put this thread since it's physics using math, so I'm sorry if it's not in its appropriate place. My problem is: I need to compute the mass of oil in a cylindrical core put into a core holder.it's partially filled of oil. I didn't know how to...

Doing a core 2 maths question, realized i can't remember how to find where a tangient and circle meet. The circle equation provided in question was x^2 + y^2 -10x + 9 = 0 same as (x - 5)^2 + y^2 = 4^2 Question was: "Given that line l with gradient 7/2 is a tangient to the circle, and...

Hi, I was just wondering if someone could point in the right direction to find formulas to calculate the natural resonant frequency of an LC oscillator circuit that uses and air core coil rather than a metal one. Thanks :-)

Ive been wondering about this for a while. i read in the newspaper about jupiters new red spot, but anyways they mentioned that it was a gas planet. does this mean that if you were to fly to Jupiter and keep going, eventually you'd go right through it and out the other side? or is it so dense...

Can anyone please explain why the inner core electrons for heavier elements would have relativistic momenta? I have not seen this clearly explained before. My thinking is: given the stronger coloumbic interaction with the nucleus (and e-e repulsion with the higher energy shells) that the...

I have noticed that the only processors that Intel makes that are both dual core and offer hyper threading are their Extreme Edition series. These processors are priced above nine hundred dollars! When do you guys think that they will sell a processor that offers both these features at a price...

WHen I was going to college I wanted one that focused mroe on Science,Technology,and Engineering. While I'm good at Science I'm horrible at English Lit. I could never pass it in High School. I don't liek History either. SO I was deciding on a college that was more based on Science and...

Hi, I have a quick question. I was just wondering which type of coil is best for inducing electricity. If I pass a magnet over one end of the coil, would a metal core help more current to be induced or would an air coil be better? Thanks, Jason O

Hi! I have one question about dams When building a dam with clay core you must prepare that core ( so the moisture would be optimal , geomechanical characteristics would be satisfied and that sort of things,don't have time to elaborate all) I have heard on lectures that there are two ways to...

If it is not urgent to upgrade your PC, you should wait for the 65nm and Dual Core 64-bit processor based PC/Notebook, it is a great improvement to cope with Windows Vista.:bugeye:

Saw this posted on another forum, and I'm not sure what to make out of it. :bugeye: :confused: http://www.msnbc.msn.com/id/11732814/from/RS.5/

I'm trying to understand what happens to a distribution transformer in relation to overvoltage conditions (in terms of saturation and current flow; not insulation failure). I understand that once the voltage has risen high enough to drive the magnetic core past the saturation point, that the...

A student wishes to light a lamp rated 12V, yet he has only a 2V rms a.c supply with variable frequency. So he attempts to step up the voltage by means of a transformer. Given Ns:Np = 6:1, resistance in the primary circuit is 70 ohm, inductance of primary coil is 0.3H, frequency f is 50Hz a.)...

We did a lab in my class where we put slices of potatoe into solutions with different molar concentrations of sucrose. Now, I am asked to find the osmolarity of the potatoe cores. How do I do this?

http://news.yahoo.com/s/ap/20051125/ap_on_sc/greenhouse_gas http://www.abc.net.au/science/news/stories/s1516607.htm http://www.newscientist.com/article.ns?id=dn8369&print=true

i hope this isn't in the wrong spot...if it is...could someone move it for me and let me know? For a while I have been working on an experiment to make a device I call the Psinetic Core (TM). I will give the implications of this device, but not its function, as I am not allowed to state theory...

Hello everyone, I'm missing this problem and i aksed the professor if i was doing it wrong and he said, nope it looks like you just use that equation and solve for I. Here is the equation: M = IA, where M stands for the moment; A stands for Area. So you know the Moment is 1022 J/T. You also...

Hi, My friend has installed a Fedoracore4 on my machine. I want to see what he has done with it to understand how. Is there any way see all the shell commands he has typed with all the answers the machine has given him?

http://arxiv.org/abs/astro-ph/0507340 Nucleosynthesis of PopIII Core Collapse Supernovae and the Abundances of Extremely Metal Poor Stars Authors: Marco Limongi (INAF-OAR), Alessandro Chieffi (INAF-IAS) Comments: 6 pages, 4 figure, Proceedings of the IAU Symp. No. 228 "From Lithium to...

Hi I have a working Fedora Core 4 system running. I discovered that xawtv is not part of the distribution (I am sure because I installed "Everything"). Perhaps it is not part of everything?? Anyway, I found xawtv for Fedora Core 3 and tried to install it. It gave an error about...

Teoretically and practically, Is there any different in using magnets as core compare to coil as core.

Hi, I need to design a high-frequency, low power air core transformer implemented by conductors printed on PCB. Does anyone know about an application notes, free software or java applet which cam assist me in this case? Thanx in advance despair_eli :cry:

http://img16.imagevenue.com/img.php?loc=loc76&image=054_doorbell1.jpg I am building a circuit such as the one above. The only difference is that it will be running for long periods of time. So heat becomes an issue. To make the most efficient and strongest electromagnet I am wondering...

Hey everyone, I'm doing a physics project, and I need to construct an electromagnet with a hollow iron core. I have searched everywhere on google, and checked my physics textbook as well, but have unfortunately found nothing. I basically just need the formula of how to calculate the magnetic...

"Iron core energy change" and "transformers vs. ohms law" Ooh yes, I do have two question. So enjoy the meal all physics lovers! :smile: 1. If the field is increased putting an iron core inside the circuit, then what about energy conservation? (I don't know much about H-fields.) 2...

In my car the OEM amplifier runs dual-voice coil subs. Its a SMT PCB with all ICs on even the outputs, no SMPS so its just 12V for the rails and the outputs are already bridged. Easy to see why many junk it and use an aftermarket amplifier come upgrade time. But I want to try to use it as is...

If someday we discover how to mine metals from the core, will it have any effect on the magnetic field or the climate of the Earth due to reduction of heat in the core as the metal mined will be hot and will slowly drain the heat of the core.

Hometest help (fixed) If i drill a hole through the center of the Earth that cross the entire planet and then i drop a ball into the hole: 1. What is going to be the speed of the ball at the other end of the planet? 2. How much time is going to take the ball of going from one end to...

Hi all, Why does electrons orbit the core of the atom instead of crashing into it? What force/forces is/are responsible for this? The difference in charge should pull them together right?

I have a consern. If we are taking oil, coal, and other natural resources from the Earth that have a large chemical energy due to hydrocarbons, then 100,000 or more years from now when they are supposed to slide under the surface of the earth, will our core start to lose enough of it's kenetic...

which one is more important in determining the size of an atom? for example - Berilium has a smaller radius than Lithium because it has a greater core charge, but what about Nitrogen vs Berilium? Nitrogen has a greater core charge, but it has electrons in the 2p subshell whereas Berilium only...