Fusion Definition and 849 Threads

Homework Statement How much ice (in grams) would have to melt to lower the temperature of 351 ml of water from 24 deg C to 5 deg C? (Assume the density of water is 1.0g/ml .) Homework Equations q=mc(deltaT) The Attempt at a Solution m=351 g c=4.18J/g*C deltaT=19deg C...

Which nuclear process is more economically feasible--fusion or fission? I think it's fusion because it produces more energy than it takes, as compared to fission. Am I right?

even if sustained nuclear fusion via deuterium-tritium type reactions were possible, and the energy that is released exceeds the energy that is put in, and this energy is harnessed as a conventional water-steam generator, would such a design be commericially viable, based on the current cost of...

I just read an article in the most recent Popular Science about a company, General Fusion, claiming that they would have fusion reactors with net power in FIVE YEARS. Of course, this sent alarm bells off in my head, and I'm wondering if there is any legitimacy to what they're doing, or if...

Homework Statement An ice tray containing 200 g of water at 25 degrees celecius is placed in the freezer. How much heat energy has to be removed to change the water into ice at -4 degrees celcius? Homework Equations Q= mc(Tf-Ti) + MLf + mc(Tf-Ti) The Attempt at a Solution I know...

I have often seen it quoted that above the mass of 13 Jupiters, Deuterium fusion is able to begin. Is this because the gravitational field of the planetary body is strong enough to give the molecules enough kinetic energy to overcome the Coulomb barrier and fuse?

What is the cheapest possible neutron detector? Are there any cheap detectors (for students)? What is the cheapest possible X-ray detector? What is the cheapest possible vacuum pump? How noisy are they? I mean: Does the pumping noise disturb the wall neighbours? Are there any other ways...

Most of us have heard about it. Some of us know a little about it. Little understand it. I am a 17 year old student, competant in the science and maths, (not to toot my own horn, but it is my best area) Is there a physician (no? physicist (damn that word doesn't look right, oh well, you...

Hi all I have to write a short essay on an application of laser technology for a class. I'm keen to write it on ICF but my uni library doesn't have a great deal of material. Can anyone link me to some reputable sources on the internet? thanks

hey guys, I am new here and thought you might like to help me out. I am a first year astronomy student at Curtin University in Western Australia. my current assignment has asked me to calculate the mass of hydrogen converted in the sun to helium and energy over 10 billion years (10 billion...

Hi everyone, want to know about the physics of nuclear fusion, fission and particle emission in nuclear reactions. Let's say that we collide two nuclei: 82Kr+48Ca at 5.5MeV/n energies, theory says that in this reaction these nuclei can fuse(with some probability) and form 130Ba, and since...

Hi, I don't know if this is the right place to post. Anyway, the fact is this: http://arxiv.org/PS_cache/nucl-ex/pdf/0701/0701065v1.pdf already published on Instrument and nuclear method B and http://arxiv.org/PS_cache/arxiv/pdf/0805/0805.4538v1.pdf already published on...

I wanted to throw out a question and see what some general consensus/opinion on the Polywell fusion power system is. After I first read about the precursor (Farnsworth fuser) and was initially interested greatly as I had similar thoughts before really researching fusion. Personally, I'm...

Homework Statement It's part of a lab designed to find the specific latent heat of fusion of ice using the method of mixtures. The results are in the 1st attachment..I want to find the specific latent heat of fusion of ice from those nos.Homework Equations heat lost by water = heat gained by...

i need some help guys. see, i was doing my school-based assessment labs probably two months ago and as i was going to write up the report I lost my procedure of how to do the experiment. In the one I did, we didn't use any calorimeter like how they describe it when you google the experiment...

Hello. Please let me start off by saying that I'm not very smart. I know I am most likely going to embarrass myself, but I hope that I do learn a lot, and maybe can one day be smart enough to not have to ask such obvious questions. Until then I'm truly sorry. Ok. Recently I have been...

I've been thinking about nuclear fusion process in the sun, and stumbled upon something weird: Basically, why there is a net energy from PP fusion? We have an input of 4 protons and output of 2 protons and 2 neutrons, now, a mass of a neutron is slightly larger than a mass of proton, so...

i was watching this show on the Science Channel and in it they talked about a new type of fusion reactor that is currently being built(construction started like 30 years ago). They said it will produce energy for entire world the same way the sun produces energy (fusing hydrogen). It's suppose...

Based on the idea that when matter is compressed and heated things tend to fuse and go to a “simpler state” the idea is that if one were to compress and heat the very constituents of matter (strings) to a level to which they all fuse. If one were to compress strings to a level in which their...

Hey everyone, When you have the fusion of deuterium and tritium, what is it that causes the release of energy? On one website i read that the energy is released according e=mc2 where mass is converted into energy (as the mass of the products<mass of reactants). On another website however, i...

This question is probably very basic for those who understand nuclear fusion but it has been annoying me for a while now and I would like an answer. I have tried searching these forums but I can't find what I'm looking for. The sun is constantly fusing hydrogen atoms to form helium atoms...

Homework Statement In a proposed fusion reactor, one possible reaction is H(2,1) + H(3,1) -> He(4,2) + n(1,0) How much energy might 150kg of the appropriate amount of isotopes of hydrogen produce? Values given Ar of H(2,1) = 2.014102 Ar of H(3,1) = 3.016050 Ar of He(4,2) = 4.002602...

Ok, all you people in the know, what's the real low-down on ITER and the possibility of fusion power reactors this century? If you believe wikipedia, and ITER themselves, the theory behind efficient fusion power generation is sound and the problems that exist are engineering problems (such...

Hi everyone, Name's Mike. I have a few questions regarding the fusion of atomic nuclei: One of the basic laws of matter is that if you loose mass you release energy, and if you absorb energy efficiently, you'll gain mass respectively. I understaind that during fission, when heavy...

Could you explain the meanings of EW global fit,pole mass,gluon fusion? Thank you very much!

Homework Statement Two deuterium nuclei (deuterium= 2.014102u) combine thru fusion to form a tritium nucleus (mass 3.016050u) and a proton. 2. Attempt at solution Two parts to this problem: a) Calculate the energy released in one fusion reaction (in MeV). So for this I went [(initial...

I've got a question on nuclear physics, specifically binding energy. I understand that binding energy is the energy needed to separate a nucleus into its constituents. But something has been bugging me. For example, Two deuterium nuclei fuse together to form a Helium-3 nucleus, with the...

What do you all think about this? http://news.softpedia.com/news/New-Storage-Method-Turns-Hydrogen-Metallic-81313.shtml http://nanotechnologytoday.blogspot.com/2008/04/tiny-buckyballs-squeeze-hydrogen-like.html http://www.popularmechanics.com/science/research/4256976.html Metallic...

The buildup of heavier elements in the nuclear fusion processes in stars is limited to elements below iron, since the fusion of iron would subtract energy rather than provide it The fusion of two nuclei lighter than iron generally releases energy while the fusion of nuclei heavier than...

Could fusion be generated with very high voltage?? Using a Van De Graaff (VDG) machine, we can easily generate million-volt high voltage. The high potential difference can be generated effectively with minimum energy supplied to the machine. The larger the volume of the machine would be, the...

http://www.physorg.com/news131101595.html "Now, esteemed Physics Professor Yoshiaki Arata of Osaka University in Japan claims to have made the first successful demonstration of cold fusion. Last Thursday, May 22, Arata and his colleague Yue-Chang Zhang of Shianghai Jiotong University presented...

http://physicsworld.com/blog/2008/05/coldfusion_demonstration_a_suc_1.html hey, it's physicsworld.com ...so what's up, anyone got some info?

Fission is a process in which a nucleus splits into two parts that are roughly the same size of the original nucleus. In fusion, two nuclei fuse, or combine, to form one nucleus. These reactions seem to be opposite to each other and yet both release large amounts of energy. Explain why this is...

So I understand that when a nucleus is formed from its individual nucleons, that there will be a decrease in mass known as the mass defect. The mass defect can be equally converted to energy following E = mc^2 and this is the nuclear binding energy. Now, is this energy released into the...

Hi! I have a major project coming up this next Thursday and am doing it on nuclear fusion used as power source. I've been reading the topic above (Fusion Summary?) and it is quite a read. I'll tell you, most of it is completely over my head, but it is one of the most interesting things I've read...

Why more energy is released in fusion than fission?

With 10000 dollars, 10 people and 1 year, is it possible for me to make a fusion generator? The efficiency doesn't matter. Any tips would be nice. What kind of fusion would be best for the situation?

1a. Is possible for an electron and a proton to fuse? 1b. If yes, do you get a neutron? 2. What PREVENTS protons and electrons fusing together in plasma [like in tokamak]? -Harry Wertmuller

Using a Van De Graaff (VDG) machine, we can easily generate million-volt high voltage. The high potential difference can be generated effectively with minimum energy supplied to the machine. The larger the volume of the machine would be, the higher the voltage could get. However, stability would...

I was just wondering if nuclear fusion is considered a radioactive process?

Lately I've been watching a few documentaries on the future and fusion is treated as a solution to all energy problems. In the Discovery Channel 2057 documentary they say we'll never have to drill for another barrel of oil once fusion is achieved... Now from what I know the majority of oil...

Hi I am by no means an expert nor have I even ever taken a class on physics. I have always been interested on such subjects however. Here is my question. I am doing research on electrolysis and found something interesting on a wikipedia with regards to cold fusion. "Cold fusion...

Can buckyballs compress hydrogen into high-density metallic form? http://www.dailytech.com/Suprisingly+Solid+New+Compound+Promises+Better+Hydrogen+Storage/article11342.htm http://www.sciencedaily.com/releases/2008/03/080320095005.htm...

To initiate fusion, it says that the nuclei of each atom need to come into contact. And these atoms therefore need to be fully ionised for this to occur. Does FULLY ionised mean that the atoms have lost ALL their electrons? thanks :)

Greetings, I'm trying to illustrate how nuclear fusion would "look" from the perspective of two nuclei that are quantum entangled. I have a very limited knowledge of quantum theory but I can imagine how two nuclei might be illustrated as a waveform consisting of two functions in...

in the equation *C^12+C^12-->Mg^24+y(+13.93 MeV)* for what quantity is the energy assigned? and how would i plug in a certain amount of carbon?

A few questions about atoms splitting and some about "cold fusion" Ok first I was thinking, when atoms fuse, they release energy, when an atom is split... it releases energy. Now, since energy is not created nor destroyed but only transferers, if you fuse an atom and then split it again, what...

I need a bit of help here, as part of a class project i was trying to explain how fusion, binding energy, reactors etc work. I always like to go a bit more indepth than the syllabus requires, and i wanted an explanation of how D-T fusion worked mathematically, to clearly show how the binding...

Homework Statement In a fusion reaction, the nuclei of two atoms join to form a single atom of a different element. In such a reaction, a fraction of the rest energy of the original atoms is converted to kinetic energy of the reaction products. A fusion reaction that occurs in the Sun converts...

Does anyone understand the physics that is used to explain this relatively new research project on use of laser fusion for energy production ?: http://www.guardian.co.uk/science/2007/may/30/energy.nuclearindustry From what they say, it appears they propose to use laser energy to "fuse"...