Fusion Definition and 849 Threads

Homework Statement A cooking vessel on a slow burner contains 10.0 kg of liquid water and an unknown mass of ice in equilibrium at 0ºC at time t=0.00 minutes. The temperature of the mixture is measured at various times and the result is plotted below. During the first 50.0 minutes, the mixture...

Would fusion make for practical applications in high speed interplanetary propulsion? Or would beamed propulsion be better?

Hi, I have a question, why wouldn't this work: Imagine you have a two large parallel plates working as a capacitor with small holes in the center of the two plates. You put a potential over the plates. The electric field is then zero outside of the capacitor. You have Deuterium on one side...

So there have been a few stories about a man named Rossi and his E-cat that can supposedly do cold fusion. My question I have is more business oriented...wouldn't a person that invented such a device prefer to keep the technology underwrap and just sell the energy than actually selling the...

This question was borne out of a discussion with a friend. We were talking about meeting future energy demands and we both think a predominantly nuclear approach supplemented by renewables and energy saver (i.e. cavity insulation for all houses) technologies would be desirable. When the...

Homework Statement For the problem below I was able to work out part (i) but I am stuck on working out part (ii) I tried using information given but was unsuccessful. Can anyone help me out? An insulated copper container of mass 0.250 kg contains 0.350 kg water. Both the container and the...

Homework Statement one gram of ice at 0 degree C contracts in volume by 0.091cc on melting. 9gm of a metalis heated to 200 degree C and dropped into and ice calorimeter. The decrease in volume was found to be 0.0182 cc. Calculate the Sp. heat of the metal (ANS:0.09cal/gmC) Homework...

I have a question , hoq much pressure s needed for atoms to start to fuse(hydrogen atoms i guess) let's say we use the same tritium and deuterium and we put them in an environment with pressure how much pressure would it need? could you please say the pressure like in G like in gravitational...

So I saw someone post this question on facebook and naturally being an Engineering student I'm curious to know now. I haven't done any Physics in a while so I'm not sure how you would tackle this one. The question was: "The power needed to operate your body is about 120 watts. Suppose your...

So, I was reading something today about an Italian Physicist who supposidly was able to make a cold fusion machine. It recently passed an important test and all that crap, and it will be interesting to see where it goes, but I was wondering how exactly cold fusion works? I get the jist of it...

What are the major differences in the fields of study and work done? I know that generally the vast majority of work done on fusion is by physicists but I also know there are several good nuclear engineering graduate programs which have an option to focus on fusion.

Homework Statement given the specific heat of water is 1.00 cal/(g*Celsius), what is the specific heat in Joules/(kg*Kelvin) Homework Equations I realize that this is simply a conversion factor issue but I have NO IDEA how to even start it.. The Attempt at a Solution I know the...

Is fission or fusion of antiparticles possible?

The efficiency to which I am referring is the amount of mass converted to energy. I need to find an academic source to cite that fusion is more efficient in this respect than fission. Any sources?

What is the smallest amount of hydrogen needed so that fusion occurs automatically under its own gravity? How long would it last? Not homework.

Hello all, I am wondering if I could get some advice from people who have done MHD/Plasma Physics (or even better, went to do something like 'MSc in Fusion Energy' which is offered by York University). Ideally I would like to work somewhere with fusion energy (although it is vastly dominated...

Cyclic Fusion Reactor_Colliding Beams_Final Edition PDF file

Hello there physicists! I am here to ask a few straightforward questions regarding nuclear fusion accomplished here on Earth. Question 1: How does a magnetic field contain the heat produced by nuclear fusion in the reactor? If we look at the example of Deuterium fusing with Tritium, a high...

((Not certain this is the right place)) Hi guys, Currently I'm voluntarily undertaking a project qualification and have decided to write a report on Nuclear Physics and how it could be used as an energy source in the future. I already know quite a bit about this topic but was wondering if...

Hi guys, I have a few questions for you and I would like to know facts, because as this is a very controversial subject people might feel impelled to answer by opinions. So, What is the real thing behind Cold Fusion? What is the Science behind it? If it really works, how does it...

Homework Statement This is the question: 2H1 + 3H1 ==> 4He2 + 1n0 +Q Where Q = 17.7 MeV The binding energy per nucleon are given below: 2H1 = 1.12 MeV 1n0 = Null 4He2 = 7.07 MeV " Determine the binding energy per nucleon, in MeV, of tritium...

The Draft of Poster of New Fusion Concept that I am going to represent at 53rd Annual Meeting organized by Plasma Physics Division of American Physical Society (attached file .zip) Without drawings yet but I will complete drawings till mentioned event.

Homework Statement I've done 2 experiments, one was to find the specific heat of nickel and the other was to find the latent heat of fusion. For the nickel experiment, it involves heating the nickel in a test tube in a water bath, and then transferring the pellets to a Styrofoam cup. With...

I have argued with others on the Talk Polywell forum about the Nuclear Binding Energy per Nucleon vs the Total Nuclear Binding Energy per Nucleus graphs (which is the NBE/Nucleon * the atomic mass number). Despite referenced statements that, while the total binding energy increases continuously...

Could we create Nuclear fusion ?? Could we archive nuclear fusion in a tokamak like a H bomb ?? If we get urani/ plotoni meltdown , it ll create - Enegry to heat up - Enough neutron to reach the Lawson criterion - Enough neutron to reduce EMF between nuclears , so it get easier to...

Hello, I am a junior in high school, and for the past few years nuclear physics has caught my attention. Mainly Nuclear Fusion. I have done some reading on the subject and I have looked around but I am having some difficulties finding what exactly I should start with studying first. Nuclear...

Why can't we use fusion for power generation? What are the problems with fusion power, and what are the limiting factors for construction?

I am inquiring as to what the theorem function is for the mean product of cross section and velocity for stellar fusion reactions? \langle \sigma v \rangle Mean product of nuclear fusion cross section and velocity. \langle \sigma v \rangle Maxwell–Boltzmann probability density function: f(v)...

Hello, I am doing a small research investigation into whether Nuclear Fusion will provide a safer and as efficient energy source as current Fission technology. Just interested if anybody has opinions on the topic and what their stance is on Nuclear Fusion, do they think it can work, any...

Hello nice people!:smile: As we all know, nuclear fusion energy in a tokamak power plant has to regenerate the tritium it burns, if fusion is to replace most fission reactors. We all now as well that this implies a neutron multiplier at the blankets, for which lead seems to be the only...

Recently I have placed here the new - viable by my opinion Concept how to produce fusion. By some reasons I have decided not to file the patent application and so for discussing now I am placing here the description of Cyclic Reactor on base of that Concept. Ioseb (Joseph) Chikvashvili

I was just wondering if, through all the fusion test done over the years, if anybody has ever mesaured the lux given off dureing a reaction?

Hello again, Physics Forums. I'm designing a Sci-Fi story and I'm fleshing out the background details. For it's sake, education, and my own curiosity, I was wondering if I could have some help with a few things related to the physics of it. A bit of an armchair Rocket Engineer, I'm using...

Hey all, I'm working in a lab and am trying to build a heat sink. Basically, I need to find the heat of fusion of a certain metal alloy (which contains multiple elements). The alloy consists of 50% Bismuth 26.7 Lead 13.3 Tin and 10% Cadmium. How do I find the heat of fusion? Is it the...

After poureing over countless fusion related text and information an idea struck me: Why is breakeven, breakeven? If the amount of energy you can extract off of a fusion reaction is highly effiecent and the fusion production method is equaly effiecent, then wouldn't that mean that input to...

essentailly cyclotrons are used to smash one atom into another. can it be done to fuse atoms? oh and i read that cyclotrons are used to treat canncer. they shoot ionizing particles at the cancer while, avoiding non cancer tissue. if anyone knows the best way to cure cancer in terms of...

Hello, I was just wondering if anybody could give me any ideas about a possible direction in a Physics issues investigation. I am looking at choosing one around nuclear energy and the issues of radiation. Any help or interesting sugestions of avenues in nuclear physics, and or possibe guiding...

1. Rank from greatest to least the reduction of mass per nucleon that accompanies the fusion of the following pairs of nuclei: a. Two hydrogen nuclei b. Two carbon nuclei c. Two aluminum nuclei d. Two iron nuclei 2. n/a 3. I know fusion is when two elements are combined and...

Some scientists have reported up to date success with such devices as tokamaks and Z-pinch devices by reporting neutron radiation that they registered inside such reactors.It gives them hope to build such a devices as ITER for following fusion researches. Meanwhile there have been overlooked...

I've been intrigued to see the Rossi claims being dismissed outright here, without any apparent examination of the evidence. There is pathological science, but there is the opposite - pathological refusal to accept any evidence. Personally, as a scientist and engineer, I prefer to keep an...

? Nuclear Fusion Homework Statement Two deuterium nuclei overcome the Coulomb force of repulsion and attain the necessary 1 × 10−14 m distance for fusion. What is the minimum initial velocity of each nuclei, as measured in the center-of- mass frame? The permittivity of free space is 8.85419 ×...

fission typically uses U-235 and fusion titrium- deuterium for their reactions. which is more easily obtained and more plentiful? also I've heard of a new fission fuel called thorium which has a radioactive half-life under a 10 years and is plentiful so, any info on this stuff will be...

i'm new to nuclear power and i wanted to know some things ANY help/ insight would be appreciated. I am still in high school and I am just interested in nuclear power 1. does fusion always involve just 2 atoms? i know that fusion and fission both require huge amounts of energy so, is there no...

Curious, why does He3 fusion (3He + 3He → 4He+ 2p) create He4 + 2 protons instead of Beryllium? (or any other arbitrary rearrangement of the protons & neutrons)

At what mass (if any) could a perfectly spherical, stationary object, without the influence of external gravitational forces, achieve fusion in space? Why/why not? What would, or would not, be the outcome of the sphere? Please supply link(s) to additional information.

Hello Guys, I have some questions relating to Cold Fusion / Low Energy Fusion. It seems Gamma Rays are not present from Cold Fusion experiments and Neutrons cannot be seen released from a sonar luminance reaction within the same nanosecond of time as the Alpha Process Completes...

Rusi Taleyarkhan published many papers in pretty well-respected journals claiming that he was able to achieve hydrogen-hydrogen fusion using bubble cavitation/sonoluminescence. However he was found guilty of falsifying his research and got his funding revoked. Has anyone with a background in...

What do you guys think about this? [crackpot link deleted] Personally I think this should be researched with utmost effort of the science community. Had to do research on this. I am not a nuclear physicist but i have some knowledge of electrochemistry and nuclear chemistry. Peer reviewed...

Where does the heat come from? What pushes the atoms together?

Homework Statement The explosive fusion occurs in several steps, but the ultimate result is that carbon is fused into nickel Assuming that the entire white dwarf is carbon that fuses to nickel, show that the energy released in the explosion overcomes the gravitational potential energy, thus...