Recent content by zodian

\sum_{k=1}^{n}\frac{1}{n+1} = \frac{n}{n+1} n+\sqrt{k} \geq n+1 for every k\geq 1 Thus \frac{1}{n+\sqrt{k}} \leq \frac{1}{n+1} and \sum_{k=1}^{n}\frac{1}{n+\sqrt{k}}\leq \sum_{k=1}^{n}\frac{1}{n+1} And nearly the same works for the other part of the inequality So I guess I was totally...

u_{n} = \sum_{k=1}^{n}\frac{1}{n+\sqrt{k}} Proof that: \frac{n}{n+\sqrt{n}} \leq u_{n} \leq \frac{n}{n+1} Ok, I've been working on that problem for about two hours now and I still don't have a clue how to proof this inequality. I guess it should be done by induction, but I have problems...

well if you put it like that, yes... but I mean everything I want to do is observing the NMR phenomenon and all I need for the moment is such an antenna... so could anyone help me?

Well... I might be wrong but I thougt that it was actually possible to emit EM waves with a solenoid; isn't that the case? oh and yeah... I need it actually to do an experiment about nuclear magnetic resonance

Hey, So I want to make an antenna which emits powerful waves in the frequency range of 1-50 MHz. Yet I don't know exactly how powerful those waves should be, but a normal solenoid is not enough... :P It should be really powerful... :D Any help is welcome :)

Hey Vanadium 50, Well basically I've just received a cathode ray tube, so the vacuum and the detection should no longer be a problem, or at least I hope so ^^

Hey :) There's one thing I want to ask. I might be wrong, but if I've well understood this formula : F=(gradient)*(m*B) explains the Stern Gerlach experiment. So what I need is a gradient. Is gradient = inhomogeneous magnetic field ? If this is true, I just have to create a magnetic field which...

That was actually my idea :) Ok I know that creating an E-field that exactly cancels the Lorentz force is going to be very difficult, maybe even impossible, since the Lorentz force, created by the inhomogeneous magnetic field, is not going to be the same at every point of the field, but I guess...

Hey guys :) Ok so basically I can't find a good vacuum chamber :( But does anyone know a formula to find the maximum pressure to avoid deflections of particles of let's say mass m and velocity v? If I knew such a formula, I could maybe design an experiment which would be possible to realize...

Ok, so before thinking about electrons or atoms, I should think about the vacuum. Is it really impossible to make a good vacuum chamber in a home-lab? In this case, I could ask a teacher at my school, because I know that we've got one at school... but it wasn't very powerful, could you tell me...

Hey, Ok so basically what i want to do is to realize the stern gerlach experiment, I know it's going to be a lot of work , but I'm highly motivated... oh and btw I'm only 16 so I don't know everything about physics and I'm not a native speaker, so sorry for possible errors concerning my...