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Homework Statement
In our physics lab about the Coulomb's law we had an Van de Graaff Generator (VdGG) to produce a charge and we had a sphere covered with foil (a conductor) which was hang up next to the VdGG. When the VdGG produced charged the sphere was attracted to it and finally touched th VdGG and became charged also. The result was that the sphere then was repelled.
We took measurements of the process and then drew a graph, from which we received a slope (of a straight line)
We did 5 trails, and receive data for 1/r^2 and F for each trail.
Homework Equations
The question is: From the slope, using Coulomb's law with the given force constant k = 9x10^9 nm^2/C^2, determine the charge Q on the speres in the units Coulomb.
The Attempt at a Solution
So, the Coulomb's Law is:
F = k * |Q1|*|Q2|\r^2
The slope = k * |Q1|*|Q2| = 3.81x10^-4 Nm^2
So the charges Q are
|Q1|*|Q2| = slope/k
I do not know how I can calculate the single charges.
Thanks for any help!