Class 2/16/10

Today in class we talked mostly about Coulombs law. Coulomb's law is basically an equation that states that Fe=(k*q1*q2)/r^2. We also learned that constant K always equals 9*10^9. Using this information, we can find Fe as long as we know the charge of 2 objects and their seperation distance!

1.) If we find out the net charge of an object and divide it by the charge of an electron (always 1.6*10^-19) we can find out how many excess electrons there are.

2.) Also, one atom has an area of 4*10^20 so if we divide the area of the object by that number we get how many atoms there are overall.

If we divide (1) by (2) we can find how many electrons were transferred when the object was charged! yaaay..

(I tried to keep it short and sweet :]) next scribe is Joe!