i was more thinking about some rules i can use when I'm sitting at my exam, can't remember the formula and need to derive it... I'm sure it's pretty easily proved but that's not really what i need.
Hi. I have this exam in vector calculus tomorrow, but I'm having trouble sorting the following formula out. Could someone help me on the track or show me why this is an equality. Feels meaningsless to merely memorize the formula.
\nabla \times (\bar{u} \times \bar{v}) = (\bar{v} \cdot \nabla)...
I've been thinking about something for quite a long time now. A muon can decay into two electrons, right? Since the spin of the muon is zero, the total spin of the elctrons must also be zero. That means one of the electron has up spin and the other one has down spin. According to the Copenhagen...
Am i the only one that considers the hp calculators way too slow? I have a HP 49G and i love it. Except the fact that i waste minutes just going through the menus. All HP calculators I've tested is slow. (Compared to Texas ti-models at least). For example, exiting from some menu may take up to...
i know it's delta, just wasn't in the mood for learning tex :)
ok, i still don't know which version to use in different scenarios. I expect questions similar to:
"In the strong interaction a particle is exchanged between the protons and neutrons in the nucleus. Knowing that the distance in...
uncertainty in Heisenbergs uncertainty principle (urgent)
This might be a stupid question, but i seem to find different versions of this the more i look. I have a big exam tomorrow, and i have a slight problem. The thing is that our textbook says that Heisenberg's uncertainty principle is
dx x...
is it that the assumption that accelerated electrons radiates is incorrect and that only oscillating electrons radiate with the frequency of the oscillation?
There is this thing I've been wondering about. When deriving Rydberg's formula and the expression for Rydberg's constant (Bohr model of the atom) it mentions the problem of an accelerated electron emitting radiation (Maxwell's theries) and hence would spiral into the nucleus.
It doesn't explain...
I was just wondering about equating the relative energy lost by the photon to the relative wavelength shift.
\frac{E-E'}{E} = \frac{{\lambda}' - \lambda}{{\lambda}'}
Haven't had coffee yet so i hope you'll excuse me. Please tell me why this is an equality.
i've been working on this but i seem to be stuck. i can't find any function for the kinetic energy of the electron to maximize. I've applied the energy/momentum conservation already deriving the equations above but as i said, i seem to be stuck. could you please elaborate? even more helpful...
there is this problem which I'm having problems solving.
An X-ray beam has an energy of 40keV. Find the maximum possible kinetic energy of Compton scattered electrons.
The electron is initially at rest.
I go at it this way.
For maximum momentum to be delivered from the photon to the...
I've just successfully built and tested a superconductor. I've seen the meissner effect in action but there is one thing I'm wondering. If the superconductor is cooled below its critical temperature, and the magnet is then put on top it floats, as it should. It also levitates if the magnet is...
i don't know if this thread is "dead" or not. But if you're still interested, i can give you some advice. I bought one today for my friend's birthday and i played with it for a while. You need to adjust the weight so that it just manages to lift off. That's the only hard part. Once you figure...