Core Definition and 484 Threads

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...

How much can it boost PC performance? Worth it or not?

Hi Can anybody help me in getting technical information about core balance current transformers. Thanks Mahadev

I watched the movie "The Core", in that movie they say that the Earth's magnetisim is based on the rotation of the Earth's core(molten metal spinning at high speeds) so does it have to be liquid metal or anything hot rotating at high speeds could creat a magnetic field? is it possible to create...

Why? I used to installing dual boot system of Windows ME and XP. After uninstalling Fedora, I can only install Windows ME/98, but can not install XP, after reboot, the system prompts me "No Operationg System". Fedora had done something on my hard drive, I used windows recovery console to...

Why is it that if you actually entered the sun's core,all time would stop,or speed up?

"Startrek" warp core Hello, The "Startrek" warp core works on the real physical phenomenon of matter collides with antimatter and energy is created. But as I was taught, a collision between an electron and a positron will produce two, very energetic, gamma-photons. how can anyone use...

http://www.nature.com/nsu/040517/040517-13.html

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:

http://www.newscientist.com/news/news.jsp?id=ns99994692 "A crystal the size of our Moon has been revealed hidden at the centre of a dying star, after an analysis of pulsations in the star's brightness. The measurement confirms indirect evidence that the cores of all such dying stars -...

Could the center of the Earth's core be a critical mass of U-235 or other heavy metals, sustaining a fission reaction. (or might fusion be possible with the presures and magentic fields there? ). If not Earth what about Jupiter or larger exra solar planet? Merlin

Velocity of the Earth's core What is the core's approximate velocity?

After watching, "The Core"(2003), a few questions popped into my mind at the painful display of physics: If the core really did stop spinning (hahahaha, like that would happen), what would be the result? Would it affect gravity at all? (I realize how asinine I sound, but I really need to...

Heating of the Earth's core must have a logical solution, which led me to this idea, the work done by gravity on vibrating molecules throughout the Earth moves the surface heat of the earth towards the Earth's core,amplifing it as it moves to the Earth's center.This is backed up by the...

"Wobble" of Planetary Core Friend of mine was asking about the Earth-Moon system, and he brought up an interesting question. As the Moon orbits the Earth, it imparts a slight wobble to the planet, much like the wobble used to infer the presence of planets aroubd distant stars. So he was...

How much of the movie, "The Core" is true?

Neptune has a core made up of _______

I have not seen the film however in the advertising they say that they must stop a weapon that will stop the Earth spinning. I was wondering what orbital effect this would have on the Earth in realtion to the sun and moon. I also wondered what gravitational effect this would have on us standing...

Have you watch the movie the core? what is mysterious with it? is it a burning furnace ?

"Skinny" galaxy harbors massive black hole at core http://www.berkeley.edu/news/media/releases/2003/04/10_skinny.shtml What kind of changes to our "rule of thumb" can we expect from this finding?

why is the core of our Earth so hot? what causes it to be so? and why some other stars and planets like neptune/uranus (i forgot) does no have such a hot core? and what purpose does the molten core of our Earth serve?