Equatorial Velocity of Electron: Find v for r=5*10^(-17)m

[asdf1]

for the following problem:
find the equatorial velocity v of an electron under the assumption that it is a uniform sphere of radius r=5*10^(-17) m that is rotating about an axis through its center.

how do you start thinking for that one?

 

[Galileo]

Do you assume it is spinning such that it has a magnetic moment of \hbar/2 ?

 

[asdf1]

what do you mean? @@

 

[Galileo]

You assume the electron is a uniformly charged sphere with charge -e. Then finding the equatorial velocity means finding how fast the electron would be spinning right? I assume you have to link the magnetic moment of the spinning sphere to that of the electron (i.e. its spin).

Why don't you post the whole question along with the context in which we should consider it. And also what you have done so far.

 

[asdf1]

:P
that is the whole question...
how'd you think of linking the magnetic moment of the spinning sphere to that of the electron ?

 

[Galileo]

Well, what other physical property would you link it to? An electron has charge and spin.

 

[asdf1]

haha... you're right~ thank you very much!