# Search results

1. ### Conversions in magnetic units

Haha yeah that's funny, but no it means something else (don't know what though). I also studied eveything in SI but SQUID and a lot of other stuff measures in emu. So that's pretty stupid, but I guess (hope) the new generation of scientists and machines will use SI-units as soon as possible.
2. ### Conversions in magnetic units

Yes but cgs units of magnetization is emu/cm^3 And to go from this value to Tesla I think I have to multiply by 4*Pi * 10^-4
3. ### Conversions in magnetic units

Hello, I am having some problems with converting experimental data to SI units. In a SQUID I measured a magnetic sample and the saturation magnetization is, let's say a. Let' s take the volume of the sample V (cm^3) According to a lot of conversion tables I should get: (4*Pi) *...
4. ### Green's function, path intergals, aaarrrgghh

Ah, ok I'll consider it. Thanks for the tip.
5. ### Green's function, path intergals, aaarrrgghh

I think I understand 1. But for 2.: Classically, there are a number of paths in configuration space, and every one of them has an "action". The path with minimal action is what will happen. So you say (correct me if I'm wrong) that if you minimise G, I will find a number of paths which...
6. ### Green's function, path intergals, aaarrrgghh

Hello, I have a question concerning path integrals. I have seen it for the first time in a course "many-particle physics", so if the path integral has a wider use: I don't know anything about it. Please think about that when you anser :smile: . As far as I understood: 1.Green's function...
7. ### Why I couldn't be a woman

Wait a moment. Technological innovations made it possible for women to pee standing up. A few years ago there was a magazine which gave one with every issue. But since I'm not a women I gave it to a friend and she said it worked fine. Take a look here: http://www.urinalfun.com/pmate.htm...
8. ### Post a joke

Why do they give Viagra to old men in the evening in the hospital? So that they don't roll off the bed during their sleep.
9. ### Funny ambiguous symbols

Try to absorb as much of the radiation as possible with your groin region. After 5 minutes and 12 seconds, however, you may become sterile That's some good advice (How can I add a smilie?)
10. ### Problematic Physics Problems ( )

If you don't neglect the friction with the first problem, the amount of work needed increases with the length of the ramp. If you call theta the angle of the ramp, The friction force is F=mu*m*g*cos(theta) and cos(theta)=sqrt(1-(h/l)^2) withh the heigth and l the length of the ramp...
11. ### Send Free SMS Worldwide with ASP Site

The first site works good and it goes fast enough, but when I send my SMS I get a page that says:" Sending, please stand by...". But tht little icon of internet explorer isn't turning so I guess it doesn't work. The second link didn't work. At least not as fast as the second. But if you...
12. ### Send Free SMS Worldwide with ASP Site

Still standing by... It doesn't seem to do anything.
13. ### The dreaded conveyor belt problem

I did it like this, but I'm not sure if it's correct. Like Tom said: P=F*v and F=dp/dt with p=m*v but here m is time-dependant and v is constant. So: F=dp/dt=dm/dt*v and P=80*4.5^2=1620 Watts

OK Thanks
15. ### Best Games

Ghost Recon is the best game I ever played. It is the closest to reality(I think).
16. ### System where the energy is discreet

Then how can I find tha a(k) 's??
17. ### System where the energy is discreet

I know when you have a system where the energy is discreet (i.e. a bound state), there is an discreet orthonormal base, and you can developpe(?) an arbitrary function in this base: f(x)=Sum{a[n]*f[n](x)}. And you can find the a[n] by multipling with f[n'] and integrate over x. Then you get...