Wednesday

December 17, 2014

December 17, 2014

Posted by **~christina~** on Sunday, March 30, 2008 at 9:14am.

I have no idea how to do this.

I know Coulomb's law is Fe= (|q1|q2|)/r^2 but how to find the "fraction" of electrons in one sphere..

help please

- Physics... Coulomb's law -
**Count Iblis**, Sunday, March 30, 2008 at 11:30amYou know that q1 must be minus q2 because the electrons that you tranfer from one sphere end up on the other sphere.

You then equate

(|q1|q2|)/r^2 to 1.00x10^4 N

Note that the expression (|q1|q2|)/r^2 for Coulomb force is valid MKS or CGS units not in SI units. The definition of the charge is different in SI units and you then need to include a factor

1/(4 pi epsilon_0).

Once you know the carge q1 you divide it by the charge of an electron. Divide by the total number of electrons to find the fraction.

**Answer this Question**

**Related Questions**

Physics-not sure how to find the charge q - Posted by ~christina~ on Sunday, ...

physics - how many excess electrons must be placed on each of two small metal ...

physics - Initially, both metal spheres are neutral. In a charging process, 1 × ...

Physics - I've been working on this problem for quite some time now and still ...

Physics - Two small aluminum spheres, each having mass 2.65×10−2 , ...

physics - Two small identical metal spheres, A and B, on insulated stands, are ...

Physics - Initially, both metal spheres are neutral. In a charging process, 1 × ...

Physics-mechanics - Two spheres are placed so that their centers are 2.6m apart...

physics - Two spheres are placed so that their centers are 2.6 meters apart. The...

physics - Two spheres are placed so that their centers are 2.9 m apart. The ...