# Search results

1. ### Fourier Transform

Yes that would be great. (By the way the info given is not the real results because the real results are classified!!) :yuck: I need to be able to see if they are indicative of noise!!! Thanks
2. ### Fourier Transform

Yes that would be great. (By the way the info given is not the real results because the real results are classified!!) :yuck:
3. ### Fourier Transform

Hi there, I have a range of results from scanning a piece of metal of length L. The results from the scan are %FSH of the oscilloscope. I have to analyse the noise of the signal and thought I'd do this using a fourier transform. Using the range of results as follows could you please tell me...
4. ### Modified Ampere's law

To be honest with you that isn't much help at all really. Why post something if you don't know the answer???? A cat makes a meow sound by the way!!!!
5. ### Modified Ampere's law

Hi I was wondering if you can help me. How is the concept of the displacement current used to resolve the ploblems with the application of Ampere's law. I know that the modified ampere's law is curl(B)=Mew(0)(jc+jd) I just know how the displacement current jd is used to solve the...
6. ### Deriving Conditions for D field

The question stated is a question on a past exam paper, I am trying to review these questions. I need to derive the boundary counditions satified by D at the interface between 2 media Please help Thanks hhh79bigo
7. ### Deriving Conditions for D field

Hi there, I was wondering if anyone would be willing and able to help me with this question. Q. Derive the boundary condition satisfied by D at the interface between 2 media. I know that the D field is continuous at the suface, but I need to be able to derive this. If anyone can...
8. ### Electric energy of a dielectric sphere

I don't fully understand, do i have to use maxwells equations to find the charge density, and if so how does this apply to a dielectric between 2 capacitor plates. I thought that the E field would be E(0)/EPSILON(r) where E(0) is the Electric field of the capacitors without the dielectric...
9. ### Electric energy of a dielectric sphere

Electric energy of a dielectric sphere!! Hi there, I have attempted a question, I was just seeing if some one can go over it and check if it is ok!! Q. The Electric field E inside a dielectric sphere placed between the plates of a large parallel-plate capacitor is uniform. Given that the...
10. ### 2 of 2-Trig

cheers for that I shall be pondering on this later on Thanks
12. ### Different views

A good way to understand this is probably to read up about the wave/partical duality. This should be applicable for all text books. Like TD said, radiation, behaves like waves and particles. Its a parradox that is very important in modern physics. Its not much help but its something tht needs...

Total energy of a dielectric sphere please help!!!! I have a problem that I can not do after searching the net and looking through my notes and text book. I think it is a basic electomagnetic field question but i just cant get my head around it. The question is: The electric field E...
14. ### If one wanted to become a theoretical Physcist

Most of the theoretical physicists at my university are actually in the maths department. But it depends on what you want to do with it that matters
15. ### Difference Between Discovery and Invention

Yet!!!!!!!!!!!!!!!!!!!
16. ### Physicists & Engineers

Engineering is a branch of physics. The physics look in most cases at the models of universal problems where as the engineer puts that model in the real world perception. Both are intellectually the same subjects. Both will go into different details of different topics, and both can rely...
17. ### MATLAB Help An asighment about Matlab programing!

By simulate Im gonna assume you are saying calculate. In this case you will need an array of values for C eg. This is how you create an array. Goto file>new>mfile C=[1 2 3 4 5 6 7 8 9 10]; etc then you need to identify what mew is by; mew=(Whatever mew is); then type in the...
18. ### If matter is made up of energy

If you look at the universe as being finite, then there must be an axis, if the universe is infinite then up=down, left=right etc. If the universe is finite consider it as a gigantic sphere with a radius there are 3 planes in the COM frame. I could be wrong by saying this, its based on...
19. ### Getting a * iq test

I personally dont think that IQ tests actually show you intelligence. They simply show how you think!!! Intellect is varied with different proffesions. For example, you could be a good physicist yet be crap at Drawing etc. People are good at different thigs!! IQ Ssimply looks at few things such...
20. ### Cold fusion?

Whilst I take your point and I do agree that physics should be taken step by step, however why not use a little bit of imagination with the knowlege, after all wasn't it the godfather of modern physics Albert Einstein who said, "The imagination is more important than knowlege!" If there is no...
21. ### Cold fusion?

whats a period got to do with it? I was merely adding a little speculation into the discussion isnt that the basis into research afterall have you tested this??? I havent yet I haven't drawn the line. This is why physics doesnt advance as quickly as it should, because people are too eager to...
22. ### Cold fusion?

So you are saying that the new scientist magazine is more of a "comic" rather than say a science publication like Physics World by the IOP? I agree, however looking at this it seems that the idea of this can be used as a neutron accelerator, which in essence could lead to a cold fusion...
23. ### Cold fusion?

here http://www.newscientist.com/channel/fundamentals/dn7315 I may have interpritated it wrong im not sure!!!
24. ### Cold fusion?

Hi I was reading an article in the New Scientist, about how fusion can be created in a device no bigger than a coffee cup. It said that an electrically polarised piece of deuterium doped lithium tantilate (don't know if this is the right spelling) placed in a strong electomagnetic field...
25. ### Difference Between Discovery and Invention

I agree with you to a certain extent, however fromulations are only a tool in the physical universe. Yes they are man made, however, the implications of a formulae are not. Formualtions are invented yet they rely on a discovery to determine. It seems like a little bit of a parradox which is room...
26. ### Difference Between Discovery and Invention

Hi, Heres a little discussion topic that I find interesting. What is the difference between discovery and invention. My own view is that discovery is the coming accross things that are already there and an invention is something which has been created by someone or something that...
27. ### Cells in parallel

Look up Kirchoffs laws and Mesh and node analysis. It should all be in the text book
28. ### 2d Inellastic collisions

I presume so however there is no specifications to the initial angles. thanks
29. ### 2d Inellastic collisions

Ok its just that it doesnt specify that in my question from my proffessor it says that the "Velocities" are the same in which case both the direction and magnitude maybe its a type error. I appreciate your help though. I understand that the velocities cant be the same Im just confused :)
30. ### 2d Inellastic collisions

hhhhhm i dont fully understand if the masses are the same and the velocity is the same and they are moving linearly, then surely the total momentum before the collision is 2mv correct me if Im wrong Im just trying to understand, because this part of mechanics has always confused me