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2d
comment Motion question
What are you confused about?
2d
comment What will be final velocity of three charges $q$, $q$, $2q$?
@ophelia, your first point is a typo, which I have fixed. Your second point is valid. I believe what I need to show is that $\theta$ actually converges at infinity.
2d
comment What will be final velocity of three charges $q$, $q$, $2q$?
@PeterShor, I have a written a solution below that seems right, but there's something I can't prove. Is there a way to show that the shape of the triangle actually converges at infinity?
2d
revised What will be final velocity of three charges $q$, $q$, $2q$?
fixed typo
2d
comment What will be final velocity of three charges $q$, $q$, $2q$?
@AnubhavGoel, $\theta$ is $\pi/6$ at $t=0$. When $B$ moves, $\theta$ changes.
2d
comment What will be final velocity of three charges $q$, $q$, $2q$?
@Fire, I have updated my solution, but it isn't particularly neat. Do let me know if you find something simpler.
2d
comment What will be final velocity of three charges $q$, $q$, $2q$?
@ophelia, I have included more details in my answer. Note that the numerical result has been corrected. Let me know if you still think something is incorrect.
2d
revised What will be final velocity of three charges $q$, $q$, $2q$?
expanded solution
Feb
9
comment What will be final velocity of three charges $q$, $q$, $2q$?
@AnubhavGoel, when $B$ is in the equilateral triangle, the force is not along $OB$, because of the unequal charges. This causes $\theta$ to change, until $t\rightarrow\infty$ when the force is along $OB$.
Feb
9
comment What will be final velocity of three charges $q$, $q$, $2q$?
@AnubhavGoel, if the force is not along $OB$ at $t\rightarrow\infty$, the angle $\theta$ would not be a constant.
Feb
3
comment What will be final velocity of three charges $q$, $q$, $2q$?
@AnubhavGoel, if the force is not along $OB$, the angle $\theta$ would change.
Feb
3
answered What will be final velocity of three charges $q$, $q$, $2q$?
Jan
28
comment Electron self-energy calculation for a $k$-dependent interaction
You might want to check out the similar calculation for electron-phonon interaction, for example in the book by Mahan.
Jan
26
comment Charge inside a charged spherical shell
It is certainly unintuitive. However, let's say the charge $Q$ is somewhere on the left of the shell's center. Let $A$ be the part of the shell on the left of $Q$, and $B$ be those on the right. $A$ pushes $Q$ to the right, while $B$ pushes $Q$ to the left. The force by $A$ is intuitively stronger since it is nearer to $Q$. However, $B$ has more charges, and the two effects somehow cancel out exactly.
Jan
26
comment Open-source code for computing response functions
@CuriousOne, thanks, the hepforge projects look invaluable. It would be great if something similar exists for the condensed matter community too.
Jan
26
asked Open-source code for computing response functions
Jan
23
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18
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19
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