Recent content by fdbjruitoirew

Could anyone give the answer for me? I need it to check, this problem seems to be simple, but I need the answer from you

Of course, nasaspook, we should review it, but I did knew this theory many years ago when I was in 9-grade class and I did give my answer. Could anyone give me your numerical answer, that is all I need

to BvU: Well, this problem can be solved simply by re-draw the circuit with the rule as: Consider all points that have the equal potential is one. So we can have a new and simple diagram, from it we get I1, I2, I3, I4, and of course, I5=0 as mentioned above. It's my steps My little brother: I...

Yeah, my steps: this DC circuit is a familiar one and we only need to know that with the given assumption as the ammeter is ideal, the potential difference between two points of \ R_5 is zero, then as a consequence \ {I_5}=0A. And \ {I_1}=2A, \ {I_2}=2A,\ {I_3}={I_4}=1A, then from Kirchooff...

Thanks naspook I did have the solution that was solved by myself, and I think it's suitable for pupils, not a student but one day, my little brother gave a solution that was different to mine, and he believes that my solution is not right, So I need an answer from you to check.

Homework Statement Left blank Homework Equations Left blank The Attempt at a Solution Well, I am not familiar with the Latex system on this website, just because I am a newbie and I rarely access to this forum. I have a problem (may be simple for you guys) but I still need a...

then just follow the steps for solving Schrödinger eqn that was written in textbook, is it your idea?

Homework Statement \hat T = \frac{{\hat L_z^2}}{{2I}} = - \frac{{{\hbar ^2}}}{{2I}}\frac{{{\partial ^2}}}{{\partial {\varphi ^2}}} Homework Equations Find eigenfunctions and eigenvalues of this operatorThe Attempt at a Solution It leads to the differential eqn - \frac{{{\hbar...

Thanks I still prefer a direct method than using quite complicated calculation, then find out a meaning behind an expression. Maybe later I would do it smoothly but now I am just newbie with Vector calculus.

I am unfamiliar with Vector calculus, a tool for learning Physics I select a homework I did not solve yet, then hope a help from you guys, in attachment pdf file My attempt: I tried to use BAC-CAB rule, but the key hardness of mine is I still do not know the concepts clearly (as you know a...

I am new and unfamiliar with these operation, so what is the name of the first identity you wrote, then I could look up online for reference thank you

Why these results are so different in formulae

I am confronting with how to realize the difference between two formulae belows \left( {\vec a \times \nabla } \right) \times \vec b, and \left( {\nabla \times \vec a} \right) \times \vec b, in here \nabla is Del (also known as nabla) Thanks