Recent content by aaronll

Yes, I meant half life ( excuse me ). So it's probabilistic, but... why? It's like when we calculate expectation value of an observable according to probabilistic interpretation of wave function? So we "found" some value with some probability to found if we measure it, but why we found a...

If I have a particle with a average lifetime of 15min, if I take 10 particles confined in a box, after 15 min there will be 5 particles. After 15min 2.5 particles and so on... , but so, at the end there will be the last particle that decades. That particle lived far longer than 15min, but is the...

Finally I understand how to find the equivalent resistance with the delta - star transformation... but it was sufficent to say "Superposition on nodes" , because with that is totally clear. Anyway thanks for the help.

Is the "Introduction to Nuclear Physics" written by Kennet S. Krane, I believe is a good book

According to my professor they come later.. so first I should able to resolve this exercise, but I don't understand how

Yes, ##R_{tot}## that I have written is the ##R_{eq}##, but to find that resistance... I tried with KCL with that bunch of equation, but I don't arrive at the end because there always too much variable in the equation I found ( e.g. for replacement)

If I start with these equation, assuming current I_i for i = 1,2,3,4,5, and using KCL and what I know about circuit and correlated laws: I have: I_1 + I_2 = I_{tot} I_1 = I_5 + I_3 I_2 + I_5 = I_4 I_3 + I_4 = I _{tot} and for general I have: ## R_{tot} = \frac{V_{AB}}{I_{tot}}##...

Maybe my question was not clear, I try to reformulate with a different situation: I have a table, 6m tall relatively to the "ground", with a cube on it. The cube has total energy of 0 ( is at rest and potential energy relatively to the table surface is 0). So E = 0. Now, I move the cube beyond...

Yes I know, maybe my question is very wrong, but if I have this apparatus: Before: particle have a kinetic energy with v1 and so total energy = kinetic energy. Enter: particle is due to the force, that is conservative, so E is conserved and gain kinetic energy ( loss potential energy). flow...

If a charged particle moves through a potential difference, it gains kinetic energy but does it also lose potential energy? When I accelerate a particle and then I "free it", what happen to its potential energy if the total energy should be conserved?

I have a question about an exercise I don't understand, I don't want the solution, only the first element to begin. I have tried with kirchhoff law, but I failed. thanks

Ok... that is. Thank you

Maybe is the fact that higher energy levels correspond to a greater expected value of r, why the electron doesn't become only "quicker" around the orbit?

Thank you But my question is because for an energy E i think there is ( if the orbit is circular with a definite radius r) an "infinite" amount of pairs of velocity and distance (v,r) with the same energy, so in what way when energy increase the electron be? higher speed? higher potential?

I have a question about what happen when an electron in the Bohr model of atom, gains energy because for example is "hitting" by a photon. Electron have an energy, and it is the sum of potential and kinetic. When they gain energy, they gain potential energy so they go further away from nucleus...